Obviously he can call himself whatever he wants to, for labels do matter, especially to the people being labelled. I agree with him.
Genesis is a case in point.
If anyone is on a bulletin board with Dr Morris, whom I have met and like personally and whose integrity I believe to be very good, I would appreciate it if they would forward this message to that bulletin board, that I might learn his reply. Though I can guess what he'll say, I'd rather not guess.