No it wasn't.
Calling the police for assistance and it taking them 45 min to get there, the kid had a right to be upset and voice his concern.
The officer, whom is obviously a hot head took offense to it and decided to get in said kids face and get physical.
Wrong move and douche bag move.
I'm in law enforcement and I dont expect every person I come in to contact with to bend over backwards because I do what I do. You treat me like a person and I do the same...the cop needs a lesson in treating people decently.