Also, I have to add that Israel can at best only achieve a pyrrhic victory here. Because although the Arab governments, fearing US military punishment, will not intervene on behalf of the Palestinians, the more that Israel brutalizes and murders the Gazans, the more hostile its immediate neighborhood will be.
Let's remember that Israel is a tiny nation on a strip of land and there are at best 5-6 million Jews in it. They are going to feel even more besieged as their neighborhood will only become more hostile and the Arab publics will not allow any reconciliation between their governments and Israel if Israel goes full throttle in murdering Palestinian civilians, which it undoubtedly will.
So this is a lose lose proposition at best.