Actually the USA has some of the most open immigration in the world. So open we don't engage Mexicans from across the border crossing with weapons the majority of the time. We have them shoot at our Border defense Patrols and they don't shoot back most of the time. Drug cartels from Mexico could easily take over portions of the UK if they bordered you. Your police often times don't even carry firearms. Our police carry two handguns and a shotgun and/or rifle in the trunk. We defend our people because we have more threats to our safety. I am glad we are not so soft on criminals and we don't let fresh immigrants push us around and censor our free speach either. Englands Finest in action: If that was in the USA it would have played out different. If he injured someone with those bricks we would have given him a time limit to get off that roof via a provided means and if he continued to throw those bricks we might have shot his ass off. Public safety and protecting the innocent is far more important than protecting a criminal hurting innocent people.