Take Jim Quinn’s advice: “Never apologize. Never.”
That wasn't an apology. "Maybe I sinned. Maybe I don't know what I actually said.", is no apology.
He knows what he said, that it wasn't a sin, and it wasn't racist. (Not until it was edited to try to make it seem that way so the drive-by media could tell all the people out here what he said was racist, just in case we didn't have enough intelligence to figure out it was supposed to be racist because they said so, even if it wasn't.)
They are the ones misrepresenting what he said, and there is no reason he should apologize for that.