I suppose it is true, as Andrew Sullivan has argued, that it is not antisemitic (or anti-that-other-desert-religion) to oppose circumcision.

Except for when it is. In case you haven't been tracking the adventures of "Foreskin Man," the antisemitic superhero, check this out. Except for the Der Sturmerish rabbis engaged in pure evil, I suppose this isn't antisemitic either.