Who's at fault in this crazy parking lot altercation??

In Tuscaloosa, Alabama a man saw another man illegally parked in a handicap spot and he confronted him about it. Then he called the police while standing behind the vehicle to prevent the driver from leaving. Well the driver backed right up over him! Some are commenting saying the man standing behind the vehicle was at fault and shouldn't have been standing there. Maybe not- but is it ok to just hit someone AND park illegally in a handicap spot?

What do you think??