Even if Israel is definitively shown to be genocidal, what the hell do you do with that? Because the result of that determination is that you now have a conflict where
both sides are genocidal against the other. How do you pick a side in that scenario without implicitly supporting genocide? Do you try to determine whether Palestinian lives are worth more or less than Israeli/Jewish lives, using your own arithmetic? Try to argue that some forms of genocide aren't really genocide when you "really think about it"?
I think it's an impossible problem from an ethics perspective.