A couple of points:
• Provocateurs occasionally get smacked.
• This does not excuse the police; inconvenience is not an excuse for violence.
He got zapped because he resisted the efforts of the security guards to remove him from the auditorium ...under the orders of the university authorities.
He was kicking and screaming and resisting ....should we allow all criminals to be released if they kick and scream and resist?
Baron Max