I am sure that if Mel would only denounce his father, all would be forgiven and Mel could return to the good graces of Hollywood.
All he had to say is “My father said/believes some things that I don't necessarily believe.”
He said the OPPOSITE of that. That his father taught him, he believes what his father taught him, and that his father never lied to him.
In context it is obvious that he is saying that his father taught him Holocaust denial, he believes his father's Holocaust denial, and he insists his father never lied to him about the Holocaust.
It isn’t his father that Hollywood started hating Gibson for, it was “The Passion of the Christ”. That interview was actually about The Passion.
I think that is what is driving our weird little friend here as well.