G-d probably does not like cheap forgiveness and insincere people. Mel is probably angry that he got caught and taped. I doubt that that "statement" was written by him.
First off only God can see into Mel Gibson's heart-not you to know if he is sincere. Did his statement or apology sound one bit angry? No, actually it was the most self-loathing statements I have ever heard. It isn't up to you to know or to see what is in his heart. Of course you wouldn't want to believe his statements and apology were written by him. That way you can more easily dismiss it.