Weird to see people speaking positive about Antifa now after seeing them destroy my neighborhood during G20 a month ago.
Maybe it's a US vs EU antifa thing but they're fucking assholes.
In Europe, we have experience with that kind of groups and these are not pretty. There is this misconception going on that the Antifa was the "heroic line of defense against Nazis", but they're not.
Most often of times, they are the reason why protests turn violent and why big social movements lose traction (99% of protests at the G20 were non-violent, inclusive and very creative and you can guess that only the Antifa riots against those fascist small shops and cars got covered in the media and people are hating the left for it). They are the biggest reason for Nazis to actually show up or use violence. If they spot one Antifa-member in a crowd, they will assume that everyone is Antifa and then the stupid battling commences.
Also, Antifa is against more than "just" Nazis: to them, basically everybody and everything is a fascist or a fascist structure. The government has to be smashed, everybody representing or supporting that government as well, because we're all fascists to them as long as we don't become them.
Finally: Ironically, the Antifa and the far-right share so many opinions, it's scary. With the G20 riots, I am very sure that the Black Bloc consisted of Nazis and Antifa, because both are against "Globalism", against the current government and against the "suppresive" police. They are an unholy alliance and that is why one has to renounce them both at every turn. They both need another and they both fuel one another. And it will only stop if we stop both.