You just hit the nail on the head. Israeli demographics are changing and the Jewish vote is becoming less influential. In fact the alarm bells should have been ringing in Israel when even Prez Bush started addressing Americans in Spanish. Obama trying to get a comprehensive peace deal for Israel is the last throw of the dice. America is not predisposed to abandon it's allies, but their strategic interest is shifting to the Northern Persian Gulf.
Death toll in Ankara blasts rises to 86 (AP)
from the article: Israel to White House: Stop anti-Israel Palestinian incitement