He's a pot stirrer. He says what will get attention.
That being said, I haven't watched the video and don't want to. Obviously Ward was way out of line being out in the midst of te cars, but is it possible Stewart thought "I'll buzz him and scare him a bit and put him in his place" and it just went terribly wrong?
Agreed. It was a stupid thing to do by both, only it turned out in tragedy.
The point on Cowherd is that he's blaming Southerners for something that happened in New York, involving a New Yorker and an Indianan. Pot stirrer or no, he's a moron.