I never liked Mel Gibson.
That being said, I think people are completely overreacting to what he said. The woman was clearly setting him up - and if you've never been in a nasty breakup or end of friendship that didn't leave you so mad and hurting, you said things you regret later, then you're probably not being honest with yourself. Just because someone didn't goad you into saying it on tape doesn't mean it doesn't happen all the time.
There is more to this story thats not getting out. He might be a racist and a jerk, but theres more to what made him say the things he did. When one person knows theyre being taped and the other doesn't, something is up.