The killing of Ayatollah Ali Khamenei in the opening phase of the US-Israeli war against Iran has generated a striking argument in strategic and theological circles alike: that the killing may have removed not merely a political leader but a normative brake on Iran’s possible march toward nuclear weapons. Reports indicate that Iranian decision-making has since hardened under intense military pressure and an increasingly securitised internal environment.

What gives Khamenei’s death a particular doctrinal significance is that he had, over more than two decades, publicly framed weapons of mass destruction—including nuclear and chemical weapons—as contrary to Islam. If that position represented a genuine religious constraint rather than mere diplomatic rhetoric, then his death may have removed more than a leader: it may have weakened the doctrinal restraint that helped keep Iran a threshold nuclear state.

What gives Khamenei’s death a particular doctrinal significance is that he had, over more than two decades, publicly framed weapons of mass destruction—including nuclear and chemical weapons—as contrary to Islam.

Islamic just war theory places moral constraints on indiscriminate violence, constraints that Khamenei appeared to project onto state policy. With that authority now gone, the central question is whether a moral tradition can discipline a state that increasingly experiences its insecurity as existential. Whether the next supreme leader can impose doctrinal restraint on a system drifting toward hard security logic.

The Islamic just war theory

The Islamic conception of war begins from a premise different from the caricatures often projected onto it. Classical Islamic thought does not treat war as an unbounded field of religious violence. Rather, it regulates warfare through a moral-legal framework derived from the Qur’an, the practice of the Prophet, and the juristic traditions that developed in subsequent centuries. The foundational Qur’anic injunction is taken from verse 2:190: “Fight in the way of God those who fight you, but do not transgress. Indeed, God does not love transgressors.” The verse both permits fighting and limits it: war is accepted as a political reality, but not treated as morally autonomous.

The Islamic conception of war begins from a premise........

© Middle East Monitor