Wandering Along the Path: Right Speech

I saw the mayor of Portland was asking that two alt right rallies be canceled in the wake of the murders of two men defending two young Muslim women.  The ACLU is insisting the rallies take place due to the guarantee of free speech.  I'm finding myself on the side of the mayor, who doesn't want more bloodshed or excuses for violence in the city.  It seems that the purpose of these alt right people is to try to be as provoking as possible to incite violence.  If the officials of the city cannot protect their citizens then this becomes a dangerous and harmful situation.  The alt right picks cities that have a liberal bent, like Portland and Berkeley,  to stage confrontations.  The "actors" and I do mean actors, are purposefully causing a fracas to lure media coverage.  Some of these people possess criminal intent and don't belong to or represent the populace of the city.  If there is a chance that innocent people will be hurt or killed, then the gathering should not take place.  Would it help if our president condemned the violence?  I'm not sure it matters, though the moral thing to do would be to disown these fringe people.  They are in it for anarchy, and free speech is a smoke screen.