Somewhere along the way the Palestinian cause has been thrown in with BLM, LGBQT, and climate actvism even though Hamas would put all of them up against the wall if given the chance.
It's nothing new. Groups that have been repressed tend to side with groups that have been repressed regardless how their beliefs align elsewhere.
Certainly not saying the Jewish people haven't been repressed through history but recent history they have been the oppressors (regardless of validity).