As described below, he had explosive fits of rage that can't be explained as anything but childish or sad. He also took the Michigan hatred to wild extremes that seem odd for someone at that level. It was Steve and Barry's leather coat wearing fan extremes.....of course, Ohio State fans eat that craziness up for breakfast. Most don't recognize how childish most of it sounds.
He was alternatively a great American and by all accounts a very honest man. And he could obviously coach football. But, it should never be forgotten that he was afraid to play Notre Dame, and that is why the 2 schools didn't meet until after his firing/death.