Members of Amnesty International and a Pro-Palestinian group held a protest at the airport against the manufacture of F35 fighter jet parts.
Protesters claim essential components for the aircraft made by the Ronaldsway Aircraft Company are being used by the Israeli Air Force as part of its war in Gaza.
Among them was a campaigner dressed in a grim reaper costume, carrying a scythe.
A spokesperson for Amnesty International Isle of Man says a letter was handed to a manger from the company.
In it, the group claims more 65,000 tonnes of explosives have been dropped by the air force on an area in Gaza half the size of the Isle of Man.
It argues the components made here are partly responsible for keeping Israel's squadrons of F35s in the air, which it calls 'the genocide jet'.
Chief Minister Alf Cannan previously made a statement in Tynwald saying Manx businesses complied with UK export licence requirements.
The Island is aligned with the UK on issues of foreign policy, and Mr Cannan said this is also the case with exports.
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