Israel's Prime Minister Benjamin Netanyahu on Thursday warned "the fate of free societies" was linked to their fight against anti-Semitism, at a conference in Jerusalem, where the attendance of far-right European politicians has divided the international Jewish community.

Guests at the symposium on combating anti-Semitism included the leader of France's far right National Rally (RN), a party whose cofounder Jean-Marie Le Pen was known for his anti-Semitic comments.

Also in attendance were a representative from Hungary's ruling Fidesz party, and Bosnian Serb leader Milorad Dodik, a Kremlin ally for whom Bosnia on Thursday issued an arrest warrant.

Analysts say the invitation of parties that have themselves been accused of anti-Semitism demonstrates the willingness of Israel's right to cultivate new relationships with unlikely supporters, amid pressure from traditional allies over the Gaza war.

In a keynote speech, Netanyahu warned that "the fate of free societies is tied to their willingness to fight the scourge of anti-Semitism".

"Eighty years ago this deadly virus........

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