This last turn of the conversation towards an examination of Jews and the Left is too annoying to pass without comment.
To state the obvious: Jews were an oppressed minority in Europe. And as it happens we were also a hyperactively bookish minority. Marxism and related ideas were new, and it was perfectly reasonable to give them a try. It’s completely understandable that there would have been a huge Jewish Left movement.
It’s important to retain respect for people, particularly those who are no longer with us, who believed in things that seemed reasonable at the time. It’s also vital to learn, and recognize when an experiment has failed. In my grandparent’s generation, the Left seemed like the place where beauty, love, comfort, compassion, and intelligence were to be found.
People learn from mistakes, and learn most from honest mistakes.