Well what goes around comes around...
He was being very rude and abusive to the guard. and disrespectful to other fellow passengers.
When i was in town a few weeks ago, some random person started to start and threaten me. Next thing i know the bouncer has slammed him down to the floor. is this classes as assault? or should he have just stood there and let him smash my face in for no reason?
There is a difference. You were threatened with violence, which does not appear to be the case in this video.