My personal take on this is that things were said between Moyes and Rooney at the time when the latter made it clear that he wanted to force a leave from Everton to United that now make it impossible (in Rooney's mind) to permit him to work under Moyes.
You could be right on this, there is also the court case between the two which can`t be easy to forget. There is no way Moyes is going to say Rooney is for sale, he will want to get the best price for him which won`t be easy after the last years performance and attitude.

