So... If I'm reading your logic correctly, all someone has to do is make a threat when something is said that they don't like, and all of a sudden what was said becomes illegal because it's "provoking violence" ?
You could make the argument that speech during civil rights movement provoked violence against blacks... should it not have been protected?
These guys have every right to do what they're (allegedly) doing.
I got your point the first time. Just trying to clarify my logic to you since you asked.