If there's one epithet the right never tires of, it's "elitism." Republicans are constantly accusing Democrats of it this campaign season, as when Kentucky Senate nominee Rand Paul attacked President Obama as "a liberal elitist … [who] believes that he knows what is best for people."
Because Israel is a refuge for Jews persecuted everywhere else, this kind of existential challenge is hard to disassociate from anti-Semitism--even if well-intended celebrities are not attempting anything of the kind. When people are trying to murder you because of your religion, it is difficult to credit the bona fides of those who merely want to shun you because of your government.
I've stopped reading news about John McCain for the same reason I tune out the daily updates on Afghanistan and the BP oil spill: it's too damned depressing. Well into the 2008 primary season, McCain showed glimmers of his old gutsy, independent spirit. Since losing to Barack Obama, however, he's turned into the kind of party hack he once lived to mess with.