After the truth about the Holocaust came out in the late 1940s and 50s, being an anti-Semite was the biggest dishonour of all. No mainstream politician, whatever his or her personal views about Jews, would ever declare anything that hinted at anti-Semitism. The “far right” had gone (for a time) into oblivion. Israel was admired.
Germany paid reparations (wiedergutmachung, “making good again”) to Holocaust survivors, as did France, an equally anti-Semitic country out of which came the first ideologue of a “master race,” Joseph Arthur, Comte de Gobineau (d.1882), whose books spread the message of Aryan supremacy. Oddly enough, Arthur was not anti-Semitic: Hitler and his acolytes embraced his Aryan supremacism and edited out Arthur’s philo-Semitism.
Anti-Semitism continued, of course, but most people kept it to themselves.