Chait, pivoting off of John Heilemann's defense of Obama's Israel policy, diagnoses an ailment of the Republican Jewish mind:
Republican Jews tend to have an overdeveloped sense of black anti-Semitism. Indeed, they generally regard traditional (i.e., white) anti-Semitism as having disappeared long ago, replaced by black anti-Semitism, which they consider largely pervasive. Their unstated assumption is that any left-of-center black politician is an anti-Semite unless proven otherwise — and proving otherwise is essentially impossible, as any statement or action will be considered a facade hiding a militant anti-Zionist interior. I have no basis for this characterization other than every conversation about anti-Semitism and Israel I've had with any Jewish Republican over my entire life.
The Dish 