Seriously do you think that alcohol has the same affect on everybody? A casual drinker versus the alcoholic, there is a world of difference. I suppose that alcohol can be a sort of truth serum at a certain stage in the night, like early on after a few drinks, but he was obviously well past that stage at 3 AM.
I know exactly what happens when you catch an alcoholic or a mean drunk on a bad night when drunk, they lash out and they don't care how far below the belt they hit. I've seen it a lot, and they don't even believe what they are saying most the time, just as long as it stings the person they are directing their anger toward.
Point is, for anybody to claim that they know that Mel Gibson is an anti-semite since he said these things while drunk is a joke. The fact is that he said some anti-semitic things after a long night of drinking when pulled over for DUI, that is it. People claiming that this is obviously how he really feels are making this into more than it really is, what a joke.