As this article states, the Middle Eastern regimes fear democratic processes. Authoritarian leadership is what keeps them in power. If Hamas truly is an extension of the Muslim Brotherhood (which I don't think it is), then the traditional regimes have reason to distance themselves from insurgent uprisings. It has NOTHING to do with Israel or tacit support for Israel.
Furthermore, Israel is portraying itself as an absolute beast on the international scene. It's one of those instances where Israel is winning the tactical objectives but losing the strategic objectives because of improper measure of force. It's a boat without a rudder and losing EU and US support by each passing day.