YY kim.
I think I'm basically trying to say that the underlying mindset of every abuser is the same - it's control. So whether that manifests as physically hurting someone in order to control them, restricting their freedom by tying them down with a family and loads of housework etc without supporting them, not allowing them access to money... it's all the same, it just looks different. Physical abuse is just a symptom or sign of the underlying control, yet it's often placed in a different category to other types of abuse, or seen as some kind of continuum where a snide comment is the beginning and a beating is the end, and all abuse leads this way eventually. I think this is false, I think there are abusers who will never ever lay a finger on their victim but their abuse is still there, it just manifests in other ways.
I also think that it's probably true that if violence is acceptable to you, you're more likely to use it as a form of control, whereas somebody else might use a different form of control, or whatever. And of course you're right as well that someone might feel something is acceptable (or kid themselves that it was a one off and doesn't count or something) when in private but is very aware that it's not acceptable in public and so will take great pains to hide this. I think it's extremely rare that an abuser knows their abuse is 100% wrong and doesn't care and does it anyway. They all justify it to themselves, and part of that is feeling that their "control technique" is acceptable, even if that's only "when necessary".