I've never seen The Passion and don't know if it's anti-Semitic. I don't hold it against a man to say nice things publicly about his father who is making an ass of himself. I appreciate an actual apology coming from a celebrity, rather than the evasive crap we usually hear. And I am hardly surprized when a person is a focus of adulation and becomes full of himself, even if he means well.
That said, Gibson's comments were horrendous. Too drunk to be in full control? Don't drink. Liable to spew forth the bigoted comments you grew up with when drunk? Then be even more careful.
People went to bat for Gibson when he was under attack. He let them down.