Same thing will happen here, you've got to decide (and it's a tough decision) what do you do?
You are a lawful citizen, who one day finds themselves on the wrong side of the law through no fault of their own - lets say the Dictator in Chief just starts changing laws without due process, lets just say. You go and protest, as is your right, and the police/militia/Fed protective services and the rest come and start beating the hell out you. You decide this is it and gather any and all weapons you can and start fighting.
You are a LEO, and get called out on 'a riot'; you go thinking "Well we can't have rioting", and before you know it everyone is swinging clubs and beating protesters. The protesters start swings back, and before you know it you're in a fight and start swinging your club.
This goes on and both sides now have bad feelings about the other; so they continue to injure/maim/kill each other.
Notice, the guys who win in this: The ones who started it in the first place; the politicians. They started violating the constitution gave false info to the police and caused this.
If something like this happens, don't fight the cops, cops don't fight the citizens: go after the root cause.
Of course, the above is trying to inject sanity into an insane situation.