Curious.
I have at my disposal a rather large machine that can easily kill some stupid bastard trying to kill me.
why didn't he use it.
Most my vehicles are 4WD and nearly twenty years old, so I don't care if they get a few more dents.
All those lines on the road are just suggestions, and if nobody sees anything then there is no crime.

I was questioning why the truck driver/victim opened his door at all. That's something you just never do when a confrontation is brewing.
Second, once the assailant parked off the roadway, why did the victim not drive away?
I think there was more back-and-forth going on, and the victim was giving the bad driver a piece of his mind -- not the way the family relayed it to the press.
Still, once the encounter turned physical, the assailant committed a crime. Assault, battery, whatever. Punching him while on the ground then kicking him? That's not a situation that can be remedied with anger management classes.
Arrests, fines and incarcerations are meant to be instructive for the rest of us -- do the crime, do the time.
Our Liberal-minded officials are teaching the wrong lessons to future criminals.