re: What is the reason for the bad blood with States baseball team?

Godfather, you nailed it re Polk's dislike of Cohen, or at least several MSU fans have said the same in another link. Initially, it was more of Polk being pissed at MSU for not hiring his former coached, and then Cohen being Cohen, it morphed into an intense dislike of him by Polk. They've kissed and made up, at least on the surface, but Polk does not go out of his way to talk to/about Cohen any.