Surely you realize that this is completely unhinged?
You are apparently an intelligent person. Doesn't it strike you that there should be a moral dimension to this? That there is a right way to act that is independent of realpolitik? Do you not realize that those people are, quite literally, under the care of Israel's government, and that to "cleanse" them would be a crime of world-historical proportions -- even if it might make life a little bit easier for people in Tel Aviv?
Besides, I don't think you understand what the reaction would be. Also, I think you overstate China's willingness, and Russia's capacity, to meaningfully support Israel should the US wash its hands of the region.