"The right to 'peaceful assembly' doesn't insure the right to assemble where public safety cannot be insured."
Absolutely correct. Which is why the police stopped the march, and the White supremists did what? They went home (peacefully).
"..is the same type of organization.."
Why do you say things like that? Stop acting like a child and debate as an adult. (Though I do commend your last two posts for having no name-calling). I'm saying they have the same right to assemble as anybody else.