That sounds more like a reason that western powers should have already nipped this in the bud long ago, rather than a reason to continue to give them carte blanche to commit war crimes. They already dropped the ball on that front, so realistically, they ought to be coming up with strategies to neutralize Israel, rather than embolden it. Perhaps they could take a page from Israel’s book and carry out some strikes preemptively exercising their right to self-defense and dismantle the Israeli military and government.
Israel’s unchecked existence is a liability to everyone, but it’s not going to get any better by letting them go even longer.