This looks really bogus. The US is not going to stop supporting Israel no matter who is president. Obama will try to encourage peace in the mideast just as all previous US presidents have done, and he will continue to support Israel as previous US presidents have done. You can count on that no matter what dubious internet posts are circulated.
Obama has no military experience, no executive experience. He has a history of voting "present" when faced with a tough decision.
I'm no soothsayer, so I don't know what Obama would do -- but there are certainly grounds to think that Obama might abandon Israel if there is a major war in that area. To him, it might seem like a politically safe course of action (I say that because I think Obama is a coward and also not very bright).