Some people just like a fight and will look for any reason for it. Some are bored, some are drunk and others just like a good ruck. When I was watching the protests yesterday there were certain groups ( and they would tick a lot of the little englander boxes) who were goading the police, walking right next to them, shouting in there faces, abusing them. Real idiots that I wished the police could just cart off but if they did it would provoke a lot more in the crowd to run over.
Ever been outside a football ground when it kicks off? whilst a lot of "normal" people are trying to get away the amount of numbnuts who come pouring into the area is frightening. Then mob mentality kicks in and things can escalate quickly.
Was good to see some people trying to tell the herberts to bugger off and that the police were just doing there jobs but honestly some people just want trouble. I think a year of lockdown doesn't help, a lot of people with a lot of pent up frustration are out and about.