SQ, I haven't read the whole thread as its topic is just too close to home. I think you made a strong point that people who don't believe in systemic oppression of women in our society focus on women's actions when anything goes wrong.
I can offer a view on your last paragraph from my own experience. What makes some men abuse women and children? The fact that they were abused. It becomes part of your world-view; just a thing that men do. It should be obvious that this goes deep into the psyche: the accepting child, witnessing and suffering abuse, learns that such is the normal run of life. This can be so hard to shift in adulthood that abusers literally don't hear what others say about living without abuse. To them, it is impossible.
What made my mother tolerate my father's violence? Brainwashing, yes, "learned helplessness" and this ability to deny what doesn't fit the template. Even today, years after his death, she idolises my father while recognising the harm he did. She holds two different realities in her mind - they're incompatible, but she never attempts to reconcile them. Splitting is a well-known psychological reaction to emotional torment. It makes the intolerable acceptable.
When both my sister and I went on to relationships with violent men, her advice focussed on love and the desirability of keeping a marriage together. She didn't really register that we were in pain: she couldn't, because that would mean tearing down her complicated, self-protective, cognitive structure. I've discussed all this with her, but never ask her to see the reality as I see it; that would be unforgivably cruel.
I don't know how you would address this syndrome if dealing with abusive parents face-to-face. I can see a strong argument for removing the children - before they've fully internalised an abusive life template - but it would be nicer to find ways of normalising the parents' perceptions.