It must be emphasized that armed struggle by the Palestinian resistance against the occupier is legal under international law. This
is from UN General Assembly resolution 37/43
adopted in 1982. There is no ambiguity about it.
1. Calls upon all States to implement fully and faithfully the resolutions of the United Nations regarding the exercise of the right to self-determination and independence by peoples under colonial and foreign domination;
2. Reaffirms the legitimacy of the struggle of peoples for independence, territorial întegrity, national unity, and liberation from colonial and foreign domination and foreign occupation by all available means, including armed struggle;
3. Reaffirms the inalienable right of the Namibian people, the Palestinian people, and all peoples under foreign and colonial domination to self-determination, national independence, territorial integrity, national unity, and sovereignty without outside interference.