A senior Muslim leader says it's "unfair" that Australians are banned from fighting in Syria or Iraq but allowed to join Israel's Defence Force.

Samier Dandan, president of the Lebanese Muslim Association, said just as Australians who have gone to Iraq and Syria to fight as enemy combatants could face prosecution when they return, those who fight for Israel in the occupied territories should as well.

He said banning people from joining the IDF would ensure "we don't create more heat within the Australian social fibre among people from different cultures".

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