And yet clearly it is justified by some people, e.g. Hamas. (Not justified to me, for the record.)

Why not just ask the unambiguous question in the poll? That would have been better, I think we can agree.

This is not correct. You have to look at the historical context and the fact that this is an anti-colonial liberation resistance struggle since about 1929. If you don't understand the root cause of the Palestinian Israeli conflict, you've completely missed the cause of the violence. The root cause is the racist Zionist ideology that, in its implementation in Mandatory Palestine, needed (and still needs) to eliminate the Native population in its acquisition of land. This is clear if you look closely at the settler violence in the West Bank. This is a war for land.