I watched it a few times in full screen at 720p and then watched it in slow motion.
True. But the RR appeared to get too close to the riders ahead of him. They slowed down from about 45-50 mph to about 20-25 mph all while blipping their throttle with one person actually blowing his horn. This doesn't happen unless "something" is going on and I suspect it was tailgating by the RR. If the riders intent was to block traffic for the stunt/wheelie boys to do their thing, they wouldn't have dropped their speed that low.
Then one guy, with no plates, swerves into the RR's lane (for a while he is sharing the lane with the RR, and is not clear ahead). Then he pulls ahead of the RR and brake checks him (while looking backwards to make sure he doesn't do it so hard that he actually hurts himself).
That was a bonehead move IMHO
Yes it did have options - he could have braked further. Most bikes can outbrake a 6,000 lb suv, especially at 20-25 mph.
True. Some of the riders' emotional responses to one of their number going down did not help the situation. But suddenly driving off and running another rider over was a bit extreme IMO
That was my point. It was all a matter of perspective. From the rider perspective, the relatively low speed chase was reasonable as well. They went waaaaay over the line with the vandalism and assault
Anyway that was my analysis of the video