If anyone would like to comment .. I’d welcome that. There is a context to this. People were stabbed and the assailant was a mentally disturbed person. But just looking at the video I wonder if people would judge the behaviour of the police ‘necessary violence’ – I would call it extreme and I think that kicking a man who is on the ground repeatedly in the head is disturbing. Zack Polansky was right to question this degree of violence. I don’t think that he or anyone should apologise for questioning violence whether our conclusion is justified or not.