[Junkenstein]

Anyway, some people who worked with Gibson (especially the director of "Hamlet", Franco Zeffirelli) said that he's always been a right wing extremist, and not only an antisemite but also a violent drunk and homophobe. He apparently loved to brag about his hatred of jew and minorities and his love of manly carnage on set.

Apparently that's something that was in his family (his father was a Westboro Church type) and exploded when his drinking got worse.