I don't remember the reference ever being made prior to Hart's comment. The context of it, the game it was in reference to and, probably most importantly, Dantonio's pointed response to it have made it into what it has become. I go back to the 60's. If it was ever commonly used prior to that it was among UM fans and not publicly "out there."
MSU is used to UM's condescension. It will never end, nor is it much of a rallying point anymore. MSU doesn't need much incentive to want to beat UM. It always does. I'm sure UM always wants to beat MSU. It's a legacy rivalry in college football. I consider it one of the top 4-5 in the game.
I'm sure Mike Hart wishes he could take it back. I think he's a good guy and at the time, he was a kid and just won a very exciting game.....with a comeback. I understood it. My only complaint with it was that Lloyd Carr didn't disassociate the team and the university from it. It clearly wasn't considered a big deal at the time. I never thought Carr was condescending to any opponent, but after that I thought he missed an opportunity to take the high road. Dantonio didn't like it and he's masterfully used it to his advantage. It's been actually a little helpful to MSU. And...if it weren't that comment...I'm sure Dantonio would have found something else to use. Just the kinda guy he is.
I think one of your guys made the nice analogy that UM always wants to win the OSU game and never wants to lose the MSU game.
For MSU, UM is the game we always want to win....and Notre Dame (when we play them) is the one we don't ever want to lose.