You should watch some of the riot videos. In one, I saw an Antifa kick an unconscious man in the head. My mother, who lived through Nazi Germany, would have understood these people as brownshirts.
However, as Antifa is decidedly Anti-Fascist and without the paramilitary aspect of the brownshirts, perhaps they would be more closely identified with the Rotfrontkämpferbund.
I have not noticed this. They seem like a hateful mob to me. Or worse. I'll be happy enough if the Feds just roll them up.
Seattle is a special snowflake because their PD is actively white supremacist and they regularly have out of town white supremacists harassing the local populace.
I'm happy their doing their thing when government fails so hard at its job.