Herbert Marcuse, one of the leading Communist theoreticians in the United States (Susan Sontag was most of the rest), had some interesting ideas about toleration. Try looking at some of these writings on his thoughts about "toleration"/"tolerance":
Some sources for Herbert Marcuse on toleration.
It's an eyeful, and completely explains these thugs' behavior.
Keep in mind, too, that Communists and Nazis were both parties of the Left. The Communists succeeded in putting over the canard, through their Western mouthpieces, that the Nazis were a right-wing party. That was never true of any Phalangist or Fascist party. They were all socialist and statist parties of one sort or another who could not be correlated with the true Old Rightists of Edmund Burke's stripe, or American conservatives, who are Jeffersonians and classical liberals (and therefore stand in the direct line of the Patriots of the American Revolution, the Antifederalists, the Jeffersonian and Jacksonian Democrats, and finally the Populists, before the Socialists took them over and turned them on to their statist poison).
Marcuse, if I'm not mistaken, was a homosexual who advocated a lot of free sex kind to the max. IIRC (I tried to read some stuff by him when I was young and psychotic) he thought the family was destructive. Let me know if I'm wrong.