and, yes - my views on speech have historically been considered left-wing. i cite chomsky because he's kind of an extremist on the topic. but, he's at the head of a long tradition of leftist thinkers that understood the primacy of speech rights.
it has historically been the right that has sought to limit speech rights, which is why the language that these "antifa" groups use is so frustrating. it's gotten so post-modern as to be post-truth. usually, they're doing it right - they're largely peacefully disrupting meetings taking place in public, which is their right, as a consequence of constitutions in both countries on this continent - but they're talking about and explaining it wrong. so, i could get into abstract debates about the value of speech with them, but it would ultimately be with the intent of having them see that what they're doing is only permitted because of free speech laws, rather than to convince them to do something else. and, i would largely not seek to interrupt their tactics.
obviously, things get a little bit different when we're talking about actual violence. violence does have a place, in context. but, you have to make sure you're actually attacking actual nazis, which aren't exactly a highly populated group at this moment. there are random idiots that are abusing the doctrine of self-defense, but they don't speak for their associated groups, and in many cases are probably undercover cops.