I'm not beating around the Bush and I don't have any of this. Money. The US is broke and Carter was able to get Israel and Egypt together because at the time, the US had plenty of this. It isn't the thing that anybody wants to say because it sounds crappy and Obama is supposed to be the Messiah that will lead the US out of it's economic quagmire. But yes; with money anything is possible.
47 killed in clashes between ISIS, Syrian rebels near Turkey border, monitor says (Reuters)
from the article: Israel: Palestinians to blame for stalled peace talks