I honestly think, in men that come from those families and continue the cycle of violence, that the empathy circuit in their brain doesn't function properly. It's not just the childhood environment. It's what else they inherited, because we get our parent's nervous system, too, or some version of it. They are victims, there's no denying that, but you can be a victim and a monster. The two aren't mutually exclusive. My father was one of several boys (big catholic family). All of the boys apart from one carried on the family legacy. One went to prison for manslaughter because he killed his wife. The brother who didn't moved away and had very little contact with the rest of the family. I think I only met him a couple of times. I remember him as being very kind. He never married and didn't have children of his own. Looking at it now, its very obvious to me that he was made differently to the others, and that's what enabled him to break the cycle in his own life.
I'm not sure that I'm explaining this very well. I think really what I'm trying to say is that my father could only cope with his anger by abusing other people, and the reason why that method worked for him was because of the way he was wired. He could have understood that about himself and , but I don't think he had it in him to be a cycle breaker. He had so little empathy that he was honestly shocked when he ended up divorced with his kids refusing to talk to him.