The only reason you’re calling them communists is because it’s the only thing you can think of that’s almost as bad as Nazis. When it comes to competition about who’s more evil the Nazis win.
They call themselves either communists or anti-capitalistic anarchists. Both are horridly disgusting philosophies of governance. Add in the violence, and yes, they are every bit as nasty as Nazis. No question.
We’re not slandering them; they slander themselves.