Some sage perspective.
I commute daily on the 405 Freeway in Southern California -- basically a crawling parking lot in places. I see ALL kinds of shenanigans every day from cagers and motorcyclists. Some of them really make me cringe, like lane-splitting (legal in California) at about 60-70 mph with traffic crawling at 5-10 mph (NOT LEGAL and damn unsafe). I see cars cut off motorcyclists multiple times a day. Every so often, I will see a motorcyclist retaliate (flipping off the cager, whacking the mirror, kicking the car, etc.). I've been cut off by someone not seeing me or (worse) seeing me and wanting to stay ahead of me. I've had drivers veer into my lane and see their eyes bulge when they actually look and see me in the lane they are closing off -- and they keep merging so I grab a handful of brake or worse yet they flip me off.
As Cal said, it WILL KEEP HAPPENING. Avoid an accident, avoid an unnecessary fight. Wait and pass. I will try to remember the same.