It's fairly easy to exclude actual neo-Nazis from smaller live shows if enough people don't want them there. Here there was one in full uniform saluting at a Marduk gig in 2017 who only got a minor smack on the head, but things have changed a lot since and I don't think people would put up with it quite the same. Depends on the city though. It's much more difficult to exclude rapists from the scene. I'm aware of one member of an NZ band in particular with very strong allegations against him. But when there's no charges laid and no conviction, it's basically defamation to go around calling him a rapist. He has far more friends in the scene who'd stick by him compared to a loser neo-Nazi, and the accuser risks being the one who gets smeared and cast out.