Don’t punch someone just cause they are wearing a Nazi outfit and think it is legal to do so… You may end up paying their medical bills & restitution.

It’s not legal, and I don’t know which judges are more lenient about this kind of thing. But if one can do it without being caught or attacked, like the two people who punched Richard Spenser, then it is an effective way to counter the rise of Nazism. Legality only matters if it’s enforceable.