The people take note. When one side starts to bring knives to a street fight the intent is obvious. They mean to kill and maim and they thought they could get away with it. In a way it's an indicator that the violence level will ratchet up and that both sides will, in future combats, have along people carrying guns, much the way that one riot started so many decades ago just a little south of here at Kent State. It took just one lunatic (probably an FBI mole in the Peace Movement) who fired a gun he carried to the riot and the hapless National Guard then opened fire on the demonstrators.
That is what the next major tussle will probably bring and it will be done by a boy who thinks he can get away with it. I can see the Fascist Party hacks (young men in their 20's) telling a young teenager to shoot the weapon they give him because, as they will tell him, as an underage youth he cannot be charged as an adult and he can get away with a juvie sentence.
If you were of a particular persuasion and the kind of sociopath these guys prove to be, the lives of your fellow demonstrators don't matter any more than the lives of your enemy and you won't be deterred from shooting a few in the name of the movement, whatever it is. It's like all those 'wildfires' that seem to have 'spontaneously' lit themselves throughout the west and the south after 9/11. They say fire needs oxygen, fuel, and heat. In a lot of cases all it needs is hate.