“Radical traditionalist” Catholics, who may make up the largest single group of serious anti-Semites in America, subscribe to an ideology that is rejected by the Vatican and some 70 million mainstream American Catholics. Many of their leaders have been condemned and even excommunicated by the official church.
Adherents of radical traditional Catholicism, or “integrism,” routinely pillory Jews as “the perpetual enemy of Christ” and worse, reject the ecumenical efforts of the Vatican, and sometimes even assert that recent popes have all been illegitimate. They are incensed by the liberalizing reforms of the 1962-65 Second Vatican Council, which condemned hatred for the Jews and rejected the accusation that Jews are collectively responsible for deicide in the form of the crucifixion of Christ.
Radical traditionalists are not the same as Catholics who call themselves “traditionalists” — people who prefer the old Latin Mass to the mass now typically said in vernacular languages — although the radicals, as well, like their liturgy in Latin. They also embrace extremely conservative social ideals with respect to women.