I am curious what happened before the clip? Model 3 owner and Motorcycle owner here. Not trying to justify that behavior as I he clearly broke the law several times aside from the obvious property damage. As a rider I can tell you, I've wanted to do that quite often but choose the higher road so to speak. We as car drivers all can admit we've made mistakes while driving, but when you are on a motorcycle and someone has one of those bad days/bad driving moments, it could kill you, so you tend to be a bit more sensitive.
Again, I don't know the Tesla driver did anything to provoke this, but my best guess based on the riders reaction is, they felt the Tesla did something to endanger their very exposed and squishy body and reacted poorly to the situation. I know the dangers of riding a motorcycle etc... etc... But as car drivers please be aware how squishy these people are on bikes and respect that. I try to do the same when in my car and around motorcycles. It's their choice to ride one and they sign up for the dangers, I get all that, but it's also our choice as car drivers, to see them first off, and secondly; try not to kill them as we safely sit in our air-bagged body armor.