The inside-the-law approach that works to some limited extent is public community rejection. Things like large groups showing up and standing with their back to the Nazis.
The method that has historically stopped Nazis like this involves getting some level of police cooperation and beating them up
I had the misfortune of working with that guy before he went mask-off. weird fucking dude who couldn’t stop hitting on the women in the office
Stochastic terrorism is the keyword. Blame edgy creators like PewDiePie for this. He exposed hateful people and ideas to his audience. He has no remorse while calling for genocide of brown people, writing “death to all Jews” or saying n-word with hard r. He also promoted imperialist, bat-shit crazy books to his fanbase.