I'm convinced there's more to it than that. Take his 5th foul on Saturday. When is the last time you saw an all-star caliber player foul out on a call like
that, at home, at that point in a close game with a championship on the line? I've never seen anything like that in my life.
I agree with CRB. It was a foul and had to be called - the real problem was some of his previous fouls which were silly and lazy on Grant's part. When the player with possession went down because Grant rolled into him, even if accidentally, its a foul. The fact that it was going to be his fifth foul is completely irrelevant - if it's a foul is a foul.
Grant does at times draw some fouls that are what I would call petty, some even phantom. Examples are the fouls he gets on the offensive end when executing 'duck in' moves - almost all are just good offensive positioning.
I do not like the way he questions officials about calls. I would really urge him to just shut up and play ball. He's most likely not doing himself any favors with officials by questioning their call, and they are not going to reverse it based on Williams' explanation.