A heated mob can get dangerous real quick. It's been proven time and time again throughout society. Without being able to tell the future, I'd error on the safe side and do whatever it takes to get myself and family the hell out of there, especially if someone was trying to break into my vehicle. Watching this gave me flashbacks of the Reginald Denny incident, where he was drug out of his vehicle and beat into a coma. I remember being in middle school when the riots broke out not too far away, and seemed to quickly spread to every corner of the inland empire. It was the longest walk I'd ever had going home. I was terrified, I remember seeing mobs kick in doors and trash peoples houses at random.
I do ride actively, but never in large groups anymore. In the sportbike community in massive groups like this, there's almost always one or two persons that's looking to provoke trouble.
Don't get me wrong, some drivers deserve to lose a mirror due to their inability to pay attention while driving (for example serial texters that coast 3/4 or all the way into oncoming traffic repeatedly) One instance I had to turn around and follow a girl that was texting and nearly collided with oncoming traffic on a two lane road just in front of me. After catching up and giving her a warning to get off the phone and pay attention, I backed off behind several cars out of her field of view just to see if she had one of those wake up call moments, and then about five minutes later SHE CONTINUED TO TEXT AND DRIVE almost ending up in another near head on collision! She didn't lose a mirror, but deserved to. Serial texters, worse than drunk drivers.
I doubt the RR owner was texting while driving, and whatever he may have done to anger someone wasn't intentional.