People are people. After being "bullied" one two many times People will fight back so to speak. It is the same as finally punching the guy that has been pestering you on the playground.
Just relax and take a break when the crowds of intolerants and jerks hit the roads at 5:00.
I have we all probably have gotten p o after being cut off by a semi the umteenth time in a day or when someone nearly kills you.
This guy lost control. You can't let someone make you angry and cause you to make a costly or deadly mistake. Let him p o someone else.
I dearly hate cities and Interstates these days. No one drives by the same rules as the other guy and no one is polite or tolerant to the other drivers in some instances.
Don't look for a reason to take offense even when the jerks nearly make you crash.
He'll get his comeupance in due course.