I think you got it wrong on Bush Jr and Obama. Bush Jr was extremely pro-Israel (although probably ended up doing more harm than good but his intentions at least were noble). And Israel did not expect anything good from Obama given his ultra-left views, muslim roots/ties and his pastor's antisemitic and anti-zionist remarks. Unfortunately Israel was not wrong.Quote from Dragons Teeth:
As far as I can recall Bush snr was not that hot on Israel either and Bush jnr was ambiguous at best, Clinton was on good footings with Israel through most of his tenure. I believe Israel given the hype surrounding President Obama and his rather close connections with the Jewish element in the Democratic party had really set itself up for disappointment. They expected great things.
I for one do not believe Obama to be overtly anti-Israel and that his present stance on the Israel and the Middle East is simply one of US national interest and political expediency. Its all about the oil as always.