I have a super left wing uncle, he posted all sorts of left wing talking points crap, and complaining and attacking those on the right. Each time he would complain about someone on the right doing something, I would post a link to someone on the left doing the same thing. He unfriended me. Just like this article says they do.
No loss on my part, but the results of the research come as now surprise.
I have been on one forum or another for 10+ years, and political talk has always been involved somewhere in there. And while I can't stand the bible thumpers and their pushing of religion, at least i know where they are coming from and what to expect. With the left, they are all over the place. It is no joke they use the alynski tactics, and dodge and change subjects constantly, eventually leading into personal attacks.