What America should have is a police force and set of laws that care about a load of violent thugs threatening and attacking others. Those Nazis should have been locked up. it should not be legal to march carrying loads of weapons, threaten others, make racist comments. And the police should be absolutely surrounding and outnumbering all those who march in this way, locking up all troublemakers, and ensuring they have no chance whatsoever to get near normal people.
I'm sure if the Nazis had been black they wouldn't have been allowed to march through town heavily armed, attacking passers by and making threats.
The phrase institutional racism springs to mind.