When people see this sort of ant-social activity, they need to go and stop it. I don't know who was filming, they may not have been in any way able to do anything, but I want to see a video where the beating starts and whoever is filming says, "f*ck that" and runs over and administers some behavioural correction. This is the definition of low trust society. Right now, there is almost zero risk to these kinds of actions. If good people don't start physically stopping these acts they will only get worse and become more common.
Agreed and with two attacking him, he had the perfect right to use deadly force.