> A white supremacist killed someone at the weekend for protesting.
> these groups are opposed to free speech and willing to kill those exercising it
This is a false equivalence. His group was not calling for violence, let alone murder. You're using the same logic that the right-wing all over the world uses against Islam.
Be careful of this. There are very few actual national socialists in the United States, and they certainly aren't all part of a single organisation like Al Qaeda.
Even among them the majority are probably against genocide since they all deny the holocaust.
What you say does however apply to The Daily Stormer. So I agree that they're a threat and should have been taken down years ago.