I'm lost as to which assertions were mine or others. To clarify, here are my takes:
1) Communism may or may not be inherently atheist. The original manifesto calls for an abolishment of religion but only as it exists as political entity. It does not call for the abolishment of spiritual philosophy but that such philosophy is of course the "opiate of the masses." My point was that people who call Pius a fascist are off-base as he was primarily anti-communist.
2) Celest: If your assertion is that Christianity as a whole engaged in anti-semitic behavior on an institutional basis you're also asserting that they were aware of this as differing from the societal norm of all religion, which was not the case. All big three monotheistic religions assert exclusivity, in other words "we're right and you're wrong." Catholicism of course has broken from this, now taking a complementary (as opposed to pluralistic) approach since Vatican II, which was in response to the growth of American catholicism versus traditional catholicism (party due to WWII, but only because of the baby boomers being a massive generation with a lot of influence). All religions change a great deal every year, let alone 2000 years. Saying that the trend is one way for 1900 years and then suddenly changes for the first time ever is a bit myopic. During the second crusade, St. Bernard of Clairvaux and other high ranking members of the Vatican spoke out against anti-semitic behavior, especially after the death of a large number of jews in Rhineland. The church's official stance was, as of the Vatican Edict of 1150 (734e Introspectamus) - "And thus in all the holy mother church may stand, righteously or not impaired, our brothers in God of Hebrew faith are one in communion of deed though not word, and must be protected by act and deed of all orders of our faith."
So in conclusion, just like with everything else in society, there are always members for and against bigotry. Ever since Mel Gibson put out the Passion, everyone is buying into this idea that Christianity is all about persecuting Judaism on an institutional basis, which is just assuming a lot, and a lot of which is contradicted by official documents of all the sects of Christianity you find. I can't speak to the practice of the individual, but the institution has always frowned on anti-Semitism.
3) I am seriously fiending for a pizza right now.