My opinion, should I have been the driver if the SUV.
Note, this is based on the laws governing the good ol' United States of Oz.
The motorcyclists were behaving in a way to suggest they were 'boxing' the SUV in, i.e. depriving him of his liberty. His partner and child were in the car, and in this case, I as a man, would take any and all reasonable action to ensure their safety.
The motorcycle that suddenly slowed (brake check irrelevant) in the front of the SUV did so with the intention of controlling the movement of the SUV (i.e. deprivation of liberty, again)
The once this happens, the SUV/bikes suddenly slow and come to a stop.
The driver of the SUV felt in mortal danger for himself and his family, as the bikers 'boxed' him in and made motions/came toward him in an aggressive manner, making the potential threat real and immediate.
The SUV then got himself out of this situation, and if by doing so hurt persons actively depriving him of his liberty, then IMHO, they got what was coming to them.
I am shocked the SUV driver showed restraint and didn't swerve from lane to lane/brake check and collect as many as possible, until the danger to himself and his family, had subsided. (you better believe I would have - I would have created such a perceived hazard to the rest of the bikers, to make them rethink pursuing myself and my family)
The only 'mistake' that video shows, on the side of the SUV driver, was he left a freeway and entered city streets, with traffic. (which resulted in him bring assaulted)
The Police Officers involved in the incident should be stood-down for engaging in/or by omission of action, allowing, this assault to be perpetrated.
Just think, if the riders weren't riding like dicks, everyone most likely would have gotten home safely, and this whole episode wouldn't have happened.
Remember, the SUV driver had real, and verifiable concern for his safety and the safety of his family - if that happened to you, I'll bet most of you would do the same thing.
The off-duty cop that allegedly broke the window did not identify himself as such, he did not place the driver, who was stuck in traffic, so wasn't going anywhere, under arrest.
There was no need to smash the window, nor pull him out of the car/further assault him.
This is why we have Police, to call and act impartially (yes, really!) and contain the situation in a lawful manner.
The bikers had 'gang mentality', individually probably none of them would behave in this way (most likely), but in a 'gang', defined not by all wearing a pretty patch, or belonging to some gang, or organisation, but by their actions, I personally consider the actions of the SUV driver to be justifiable.
My thoughts, and remember, yes I ride, my bike has been my sole means of transport for the majority of the last 20 years, and I have and do ride in groups, but never, ever would I, or have I, engaged in this sort of activity.
Cheers,
Rick
P.S. Interestingly, in Oz, these riders would have been deemed to have broken so many laws, long before the motorcycle suddenly slowed in front of the SUV.....