And if you punch them, expect to be arrested, because assault is a crime, but being a Nazi isn't.
Eh, technically. Lot of the stuff it entails certainly is, though. Good chunk of what's common for 'em to indulge in when they outnumber someone is, too. As identifiers for likely criminal activity goes, the ones trying to incite violence and having ethnic cleansing and genocide as explicit goals aren't exactly the worst you could roll with.
Any case, if you happen to be on the white/conservative side of things in the US, you'd even have pretty good odds of
not being arrested, or dealing with much consequence even if you are. Lotta' folks get a good deal of leeway in this country. Have a beer or two first, be contrite, maybe make sure you're in an area where you know some of the local cops or politicians. You really feel like punching a nazi and largely, if not entirely, getting away with it, you got methods available. Corruption and racism is a hell of a drug.