The perfect reply would have been
If you would have broken his teeth or even punched him on the face, you would be pretty dumb. In western countries, even pushing someone away can lead to assault charge, and if recorded on camera like in this case, can easily lead to conviction, criminal record, jail sentence, losing your job and getting deported. Off camera, sure maybe you can beat him, if no witnesses around. That's pretty much the no. 1 reason why he keeps the camera focussed all the time, so that the other person thinks before raising a hand. If you beat him, he has nothing to lose and only to gain, he gets money off you in court.