Frankly I think it's rather sickening that so much grief is displayed. The very nature of stock car racing is one where the mechanical variables are so precisely balanced and the window for perceptible human triumph is so miniscule that the only truly spectacular moments occur when man or machine, or some combination thereof really fucks up. When they show racing highlights on the news, they show the crashes, the winner crossing the finish line, and drinking his milk in the winner's circle.
Of course, maybe I just don't understand the sport. My brother would argue that nothing is a sport unless there's a motor involved. He assures me that hockey counts because of the zamboni. So does golf, even if it is just an electric motor.
Then again, every summer he drives a car at county fairs where the object of the sport IS to crash, and to have the last car running. Go figure.