> We ... take the clear position that the First Amendment does not protect people who incite or engage in violence. So does this apply to Antifa, BlackBloc, et al as well?
Do you have examples of ACLU defending antifa or black bloc events? They haven't, to my knowledge, but that's not even the most important difference. Antifa isn't a group or organization that holds rallies, and black bloc isn't a group at all (it's a tactic). Antifa shows up when right wing violence is expected. It is a direct response to white supremacist violence; remove white supremacist violence from the world, a…
http://www.latimes.com/nation/la-na-charlottesville-witnesse...
With witness testimony of antifa violence.
In my own home town, I've seen the militant left engage in violent protest of "bad people". The "bad people" weren't actually doing anything other than talking. But OMFG we all know they're evil, right? So violent suppression of their free speech is a Good Thing.
While I live in a generally left country, and am generally somewhat leftist myself, I find the tactics of the authoritarian left to be abhorrent. If someone can't talk reasonably with people on "the other side", they don't deserve my respect or support.