It looked like different people on both sides showed up looking for a fight. They had a fight, it escalated, and a person died. Stupid and pointless. Two groups that hate each other and both believe they are in the right, not a great environment for any productive conversation. 

I am no supporter of the alt right or the alt left, I wouldn't go to something like that, or recommend any my family or friends do either. People that entrenched in their beliefs leave alone, ignore completely, you can't change them, focus on people around you and don't agitating the natives. 

The IQ of a mob is the IQ of its dumbest member divided by the number of mobsters.