It's being reported that his hate-fuelled rants were unleashed during fights with his ex, as their relationship unraveled.
Grigorieva claims she made tapes of his outbursts after he uttered death threats and became physically abusive towards her.
"You're an embarrassment to me," Mel tells her at one point. "You look like a f***ing pig in heat, and if you get raped by a pack of n***ers, it will be your fault."
Mel's profane outbursts are littered with references to Oksana being a "whore" and "c**t".
In another tirade, Mel tells Oksana: "How dare you act like such a bitch when I have been so f**king nice." He warns, "I am going to come and burn the f**king house down... but you will blow me first."
I guess she refused to dress modestly in accordance with the precepts of Gibson's traditionalist catholic church - with her head covered and wearing only ankle-length skirts, never pants.
How likely would it be, were Gibson to kill Grigorieva - as legal documents have documented that he has threatened to do - her murder'd be headlined as an "honour killing"?