That's a very tactical criticism. It seems like something very important is being lost in these comparisons. The primary criticism of Nazis and white supremacists is not their tactics or their protests, it's that they are fucking Nazis and white supremacists.
It's not tactical criticism, it is a personal account of what anyone can see by searching youtube for "antifa": that they're thugs who use their supposed "anti-fascism" as a pretext for their thuggery.
If there aren't any nazis, a good old international summit will do.