Who else gets support from the USA to invade anyone they want to except Israel? And why? "Why" is really the most interesting part of the question. I think we'd all like to know exactly why...and how...that is accomplished.

That last one isn't so difficult. The right-wing media give the American people Israel's story. No-one gives them the Palestinians' story. You have to want that and look it up for yourself. And no politician who values his career can brief against Israel. You do that, you're toast. You have AIPAC and the lesser members of the undemocratic Israel lobby to thank for that.