Dude. We have actual evidence, not circumstantial, not biased witnesses; of Israel inducing a famine, shooting unarmed civilians trying to cross their lines, killing reporters, and using doctors as human shields. (Who they then killed anyway).
This isn't a wait until it's over thing. This is an act now thing. For reference these guys already have more credible war crime allegations in 4 months than the US had in 20 years over a much larger area. It's not rocket science.