The Koreas | Diplomacy | East Asia

South Korea’s Harder Line on Israel Amid Energy Shock

It’s not just about Israel: Seoul is signaling political confidence and a growing readiness to shape its own external posture separately from the United States.

A new diplomatic tension has emerged between South Korea and Israel in recent days. It began after President Lee Jae-myung publicly criticized Israel on social media over alleged human rights violations, sharing a video and drawing comparisons to historical atrocities such as Japan’s colonial crimes and the Holocaust. Israel responded sharply, accusing Seoul of misrepresenting the situation and unnecessarily escalating the dispute. 

What makes this tension significant is the fact that the dispute started from the highest political level in Seoul. South Korea has traditionally maintained a cautious and carefully balanced position on Middle Eastern conflicts, particularly as a close U.S. ally and a country heavily dependent on the region for energy imports. Lee’s unusually direct language marked a notable departure from Seoul’s conventional diplomatic tone.

That shift did not emerge in isolation. Since the Iran war began, Seoul has faced increasing pressure from Washington on both security and alliance coordination. The most consequential moment came in March 2026, when the United States planned to redeploy air defense systems stationed in South Korea to the Middle East. Lee openly expressed regret over the move and made clear that Seoul had opposed the transfer, even while assuring the public that deterrence against North Korea remained intact. 

The symbolism was difficult to ignore: air defense systems long justified as vital to the Korean Peninsula’s security posture were suddenly redirected to another theater. For Seoul, this raised serious questions over how quickly alliance priorities could be reordered under U.S. wartime demands.

The pressure intensified when U.S. President Donald Trump publicly criticized South Korea’s limited support for U.S. operations linked to the Iran war. Trump included South Korea on a broader list of allies (including NATO, Japan, and Australia) that he disparaged for not doing enough to protect shipping routes in the Gulf. This was significant because Washington was signaling that its alliance expectations could now reach into the Middle East as well.

For the Lee administration, this created a sensitive balance. It could not afford a direct rupture with Washington, yet it also had to respond to growing domestic concerns as the conflict began to affect South Korea’s economy.

The economic dimension is what transformed the war from a regional crisis into a direct national challenge. South Korea remains heavily dependent on the Strait of Hormuz for crude oil and petrochemical imports. Once the conflict began to threaten flows through this route, the domestic consequences followed quickly.

According to a report by the National Assembly Budget Office of Korea, the country remains structurally vulnerable to instability in the Middle East, with 72.7 percent of its crude oil imports sourced from the region in 2024. The Strait of Hormuz continues to serve as the country’s most critical energy lifeline – and the strait has been de facto closed by Iran amid the conflict.

The report warned that if tensions escalate further and oil prices rise to around $100 per barrel, South Korea’s trade balance could deteriorate by $40.8 billion, while inflation could rise by 1.3 percentage points. In a worst-case scenario involving severe disruption of Hormuz and oil prices reaching $130 per barrel, the trade balance shock may deepen to $81.5 billion, with inflation rising by 2.0 percentage points. 

This explains why the government moved rapidly toward supply diversification and emergency stabilization measures. For Seoul, the crisis is no longer only about alliance management; it’s a direct threat to macroeconomic and even political stability.

As an export-driven and energy-importing economy, Seoul cannot treat instability in the Middle East as a distant geopolitical matter. Once supply chains and fuel security come under pressure, the crisis directly affects inflation, industrial production, and broader market confidence.

Domestic industrial stability has become a policy priority during the crisis. This internal focus is further evidenced by the Lee government’s unprecedented emergency relief package, which provides up to 600,000 won ($420) in oil crisis subsidies to citizens to prevent social unrest during this period of economic volatility.

On the foreign policy front, Seoul aggressively began diversifying its resource procurement, securing oil from Kazakhstan, Oman, and Saudi Arabia. It has also taken the controversial step of resuming naphtha imports from Russia to provide a new source of a key industrial input.

Lee’s pursuit of strategic autonomy revives a survivalist tradition from 50 years ago. During the 1970s oil crisis, the Park Chung-hee administration faced a remarkably similar energy-security nexus. When the global oil shock threatened the nation’s heavy industrial core, Park pursued a policy of diplomatic diversification. 

By 1979, the government sought closer relations with the Palestine Liberation Organization (PLO) to secure stable oil supplies from Arab states. This rapprochement with the PLO was a calculated bargaining chip used to safeguard national security and promote a self-reliant defense policy. In a move that marked a shift in diplomatic relations, the Israeli embassy in Seoul was closed in 1978 amid political sensitivities and Seoul’s diplomatic realignment toward Arab oil-producing states.

The historical parallel is striking because the underlying structural pressures remain largely unchanged. In the late 1970s, the rift was exacerbated by the Carter administration’s focus on American troop withdrawals. Today, the return of transactional rhetoric from Trump has revived the “free-rider” narrative and deepened the erosion of strategic trust.

All developments point to a South Korea that is increasingly willing to defend its own strategic interests even when they do not fully align with Washington’s immediate priorities. The sharper tone toward Israel, Seoul’s visible discomfort over the redeployment of U.S. defense assets, and its rapid move to secure alternative energy routes all suggest a country seeking greater room for independent action.

This is where South Korea’s role as a middle power becomes most visible. Rather than acting as a passive ally, Seoul is signaling political confidence and a growing readiness to shape its own external posture in response to crises that directly affect its economy and security. In this sense, Seoul is not merely managing a crisis, but actively redefining its diplomatic space and strategic agency on the international stage.

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A new diplomatic tension has emerged between South Korea and Israel in recent days. It began after President Lee Jae-myung publicly criticized Israel on social media over alleged human rights violations, sharing a video and drawing comparisons to historical atrocities such as Japan’s colonial crimes and the Holocaust. Israel responded sharply, accusing Seoul of misrepresenting the situation and unnecessarily escalating the dispute. 

What makes this tension significant is the fact that the dispute started from the highest political level in Seoul. South Korea has traditionally maintained a cautious and carefully balanced position on Middle Eastern conflicts, particularly as a close U.S. ally and a country heavily dependent on the region for energy imports. Lee’s unusually direct language marked a notable departure from Seoul’s conventional diplomatic tone.

That shift did not emerge in isolation. Since the Iran war began, Seoul has faced increasing pressure from Washington on both security and alliance coordination. The most consequential moment came in March 2026, when the United States planned to redeploy air defense systems stationed in South Korea to the Middle East. Lee openly expressed regret over the move and made clear that Seoul had opposed the transfer, even while assuring the public that deterrence against North Korea remained intact. 

The symbolism was difficult to ignore: air defense systems long justified as vital to the Korean Peninsula’s security posture were suddenly redirected to another theater. For Seoul, this raised serious questions over how quickly alliance priorities could be reordered under U.S. wartime demands.

The pressure intensified when U.S. President Donald Trump publicly criticized South Korea’s limited support for U.S. operations linked to the Iran war. Trump included South Korea on a broader list of allies (including NATO, Japan, and Australia) that he disparaged for not doing enough to protect shipping routes in the Gulf. This was significant because Washington was signaling that its alliance expectations could now reach into the Middle East as well.

For the Lee administration, this created a sensitive balance. It could not afford a direct rupture with Washington, yet it also had to respond to growing domestic concerns as the conflict began to affect South Korea’s economy.

The economic dimension is what transformed the war from a regional crisis into a direct national challenge. South Korea remains heavily dependent on the Strait of Hormuz for crude oil and petrochemical imports. Once the conflict began to threaten flows through this route, the domestic consequences followed quickly.

According to a report by the National Assembly Budget Office of Korea, the country remains structurally vulnerable to instability in the Middle East, with 72.7 percent of its crude oil imports sourced from the region in 2024. The Strait of Hormuz continues to serve as the country’s most critical energy lifeline – and the strait has been de facto closed by Iran amid the conflict.

The report warned that if tensions escalate further and oil prices rise to around $100 per barrel, South Korea’s trade balance could deteriorate by $40.8 billion, while inflation could rise by 1.3 percentage points. In a worst-case scenario involving severe disruption of Hormuz and oil prices reaching $130 per barrel, the trade balance shock may deepen to $81.5 billion, with inflation rising by 2.0 percentage points. 

This explains why the government moved rapidly toward supply diversification and emergency stabilization measures. For Seoul, the crisis is no longer only about alliance management; it’s a direct threat to macroeconomic and even political stability.

As an export-driven and energy-importing economy, Seoul cannot treat instability in the Middle East as a distant geopolitical matter. Once supply chains and fuel security come under pressure, the crisis directly affects inflation, industrial production, and broader market confidence.

Domestic industrial stability has become a policy priority during the crisis. This internal focus is further evidenced by the Lee government’s unprecedented emergency relief package, which provides up to 600,000 won ($420) in oil crisis subsidies to citizens to prevent social unrest during this period of economic volatility.

On the foreign policy front, Seoul aggressively began diversifying its resource procurement, securing oil from Kazakhstan, Oman, and Saudi Arabia. It has also taken the controversial step of resuming naphtha imports from Russia to provide a new source of a key industrial input.

Lee’s pursuit of strategic autonomy revives a survivalist tradition from 50 years ago. During the 1970s oil crisis, the Park Chung-hee administration faced a remarkably similar energy-security nexus. When the global oil shock threatened the nation’s heavy industrial core, Park pursued a policy of diplomatic diversification. 

By 1979, the government sought closer relations with the Palestine Liberation Organization (PLO) to secure stable oil supplies from Arab states. This rapprochement with the PLO was a calculated bargaining chip used to safeguard national security and promote a self-reliant defense policy. In a move that marked a shift in diplomatic relations, the Israeli embassy in Seoul was closed in 1978 amid political sensitivities and Seoul’s diplomatic realignment toward Arab oil-producing states.

The historical parallel is striking because the underlying structural pressures remain largely unchanged. In the late 1970s, the rift was exacerbated by the Carter administration’s focus on American troop withdrawals. Today, the return of transactional rhetoric from Trump has revived the “free-rider” narrative and deepened the erosion of strategic trust.

All developments point to a South Korea that is increasingly willing to defend its own strategic interests even when they do not fully align with Washington’s immediate priorities. The sharper tone toward Israel, Seoul’s visible discomfort over the redeployment of U.S. defense assets, and its rapid move to secure alternative energy routes all suggest a country seeking greater room for independent action.

This is where South Korea’s role as a middle power becomes most visible. Rather than acting as a passive ally, Seoul is signaling political confidence and a growing readiness to shape its own external posture in response to crises that directly affect its economy and security. In this sense, Seoul is not merely managing a crisis, but actively redefining its diplomatic space and strategic agency on the international stage.

Dr. Mehmet Fatih Oztarsu is a professor at Joongbu University and senior researcher at the Institute of EU Studies at Hankuk University of Foreign Studies. He is co-editor of "Emerging Partners of Central Asia: Engagement of Small and Middle Powers" (Springer, 2026). He also serves as deputy director of the Seoul Institute of Global Affairs (SIGA).

Israel-South Korea relations

South Korea Hormuz closure

South Korea in the Middle East

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