Umm... it absolutely was cut and dry. 75 years ago a set of westerners came and occupied another country through massive, brutal and widespread violence all under the approval of western govt's that themselves felt massive guilt about the holocaust. The Israeli gov't pretended to give Palestinians rights all while calculatedly trying to suppress any legitimate form of gov't (read about Israels massive support of Hamas starting in the 80s because they believed they would have a tougher "negotiating position" against extremists... guess that backfired. They enforced apartheid, blockades, mass surveillance etc. naturally that resulted in resistance. Is resistance justified? Who cares. Is it a natural consequence of material conditions? Absolutely.

I have a friend who would say anytime someone brings up that "it's a complex issue": "They should just stop stealing peoples houses dude". This pretty much sums it up. Maybe if they stopped that a few decades ago this wouldn't have happened.