The issue here is that I don't think he thinks about it at all. The issue here is "someone is going faster than I am/passing me and that's unfair and makes me big mad."

 
You see that sort of behavior on the Parkway West going towards Robinson all the time. People will speed and weave through traffic to get to the front of the pack and stay there. Just their lizard brain screaming "I HAVE TO BE FIRST" at them.

 
Arguing about the legality of it is just window dressing to make his temper tantrum sound reasonable.