Re: CNU firing you say, "Athletes often don't know the real reason and the coach can't ever say. So, I am wondering what he did."
Why wonder? What's the point of potentially kicking someone in our profession when they're down? He, obviously, did something that his superior(s) and HR felt necessary to go in separate directions.
Encouraging a petition (if he did) might be the questioned move vs. the mistake(s) he made while on the job. It's an easy climate to get fired in now-a-days. One day everything is fine. The next day you walk in and you get your pink slip. Or problems build up over time and enough is enough.
Either way, my personal stance as a college coach is always to TRY not to wonder or think less of a person for getting fired/having resigned. And I've never even met Matt, but starting rumors or gossiping or saying mean things about other coaches on a message board only degrades our profession.