The wheel turns and now they are in power. Suddenly it is cancel, no contact, punch Nazis, hang the traitors, and so on. You don't get to speak anymore, then sneering about "freeze peach." Laughing about the misfortunes of others. Give people a little taste of authority and, well, masks off.
I am reminded of that Flannery O'Connor story, and I guess some people would be decent were someone there to shoot them every minute of their lives.