Who was it that said, "Your right to free speech ends at my nose."?
There are many things, like yelling fire in a crowded theater (when there is no fire), that are not protected by the First Amendment. It would seem to any reasonable person that a bunch of Neo-Nazi, white supremacists wielding guns and clubs and wearing helmets and body shields parading in a busy downtown area would fall into that same category ... whether or not they had a permit.

Best,

RTD