Again, how the fuck did Petrino "undermine" Tuberville.
Suppose I have a tech manager I work for, Bill, and a project manager above him, Joe. I'm friends with both of these guys. Now, I get a job offer from a competitive company, offering to pay me more money, and make me a tech manager, and I decide that I should take the job. After one year on that new job, Joe calls me up and says that things with Bill aren't working out, and they might get rid of him. If they do, would I be interested in the job? Oh, and they'll double my salary. Again, I'd be stupid no not at least listen.
That kind of shit happens EVERYWHERE.
And I guaranfuckingtee that Tommy Tuberville would have done the exact same fucking thing if the roles were reversed.