"Professor Greenspan has chastised me for alleging that antisemitism has been found among social democrats. He seems to believe that the demonizing of Jews is limited to ultra-Rightists such as Joseph Welch, founder of the John Birch Society."
I don't think a fair reading of my post would lead to the conclusion that I believe "demonizing of Jews is limited to ultra-Rightists." Quite the contrary, as history has documented all too well.
I understand that a blog post can't include a lot of nuance. But how does the role Jews played in creating/leading labor movements and related in the U.S. and (when possible) in Europe--thus becoming the internationalist Left menace rather than the Right one--fit your theory?