The USA is just as devoted to the Israeli cause now as ever, and Netanyahu knows it. Accusing the USA of "cozying up to Palestinians" is a way of turning the thumbscrews on Obama, with the net result that Obama will reflexively become even more pro-Israel. A dreadfully simple and transparent tactic, but it works when you're dealing with incompetents like Obama.
Hours before Mumbai bomber to hang, court rejects final appeal (Reuters)
from the article: Secret Israeli report: U.S. cozying up to Palestinians