A republican girl gets Ron Paul's recent book Liberty Defined as a Christmas gift. As soon as she reads his views on Israel she bursts into tears.
Whether one regards Paul's views on Israel (referring to it as an "apartheid state") as anti-Semitic, the fact remains that for Republicans and many other Americans his views on the subject are a disqualifier for the presidency. Even one longtime Ron Paul aide now refers to his foreign policy views in general, and his views on Israel specifically, as toxic:
He is however, most certainly Anti-Israel, and Anti-Israeli in general. He wishes the Israeli state did not exist at all. He expressed this to me numerous times in our private conversations. His view is that Israel is more trouble than it is worth, specifically to the America taxpayer. He sides with the Palestinians, and supports their calls for the abolishment of the Jewish state, and the return of Israel, all of it, to the Arabs.
(Edit: The original YouTube video isn't available anymore, perhaps to spare embarrassment. Some have also speculated the video was faked to discredit Ron Paul, as if his already published views don't do that anyway. Whatever the case, you can judge for yourself.)