They are both wrong and they are both right. Up until this past week, I tended to be more sympathetic towards Palestine. Unfortunately, the most recent terrorist attack by Hamas was against more than just Israel or its military. It was a terrorist attack at a music festival, and Hamas attacked citizens of multiple nations.
It’s a lot easier to support Israel right now. It sounds like they’re about to commit their own atrocities though, so you might have to flip your position tomorrow.