It does seem possible that his parents aren't quite as bad as yours. I mean, they seem to have forced him to get treated for his depression - they don't seem to be dragging him to religious services against his will.

Though it's possible for something to both be a betrayal and also crucially necessary, and it's understandable for a person to say "I get why you did it, and I understand it, but I still cannot forgive it". Not logical, maybe, but... well, we're not, are we?