This is the last thing I am going to say about this because I am really beating my head against a brick wall here.
Racism needs to be stopped. It is obviously harmful, stupid, and often deadly. White nationalism, nazi sympathizers, and all that shit - I think it has absolutely no place anywhere and hate speech laws should be strengthened to stomp it out wherever it rears its head.
Where you have a justice system in place, that is the appropriate means of taking action. Laws and the application of them is fundamental to complex societies. As it turns out, Washington state has a law that likely could have dealt with this guy and the police actually enforce it. As noted above, all of that system is in need of improvement.
Vigilante justice is deeply flawed and so much worse. It depends on individuals undertaking it to conform to the moral norm (which can be wrong) and relies on the fallible judgment of an individual. Random folks should not be judge, jury, and executioners.
Punching someone seems like a minor thing to do, but it can be deadly. A good friend of mine lost her brother when some dude took an offhand comment too seriously and punched him once. Just because a punch is a problem solving tool in 90% of mass media does not mean it is one that should be employed lightly.
The comparison of how to approach an angry idiot on a street corner who is wearing the garb of a genocidal empire to how allied soldiers fought nazi soldiers is ridiculous. One, this incident wasn't an armed conflict. Two, the violence wasn't state sanctioned. Three, the nazi idiot didn't need to be subdued for the laws to apply to him. And that's the biggest one. For all the flaws of your cops and your president, this Nazi moron on a corner was on an American corner. You didn't need to bomb him to subject him to your laws, you didn't need to shoot at him to protect the rights of other citizens, you didn't need to use force to give yourself authority to impose peace. This angry idiot was like the nazis at the end of the war. You have control and the tools to deal with him without force.
I get the visceral satisfaction of seeing somebody shut down like that, but the endorsement of mob rule is depressing. American institutions of democracy and justice, even as broken as they might seem, are a better shot at freedom than anything else.