It was SOOO hard for me to understand that my past wasn't normal and was abuse. And most say its "extreme". I still can't say it was "bad" or "horrible". I still struggle with it but I can say it was abuse and torture. But that took years. About 5 or so. But thats me.
I grew up in a cult and left at 19 so I never got to see a "normal" family so my therapist used his own family, stories of his family, as an example of what "normal" is and had me compare it.
The biggest thing is "what if it happened to someone else"? So if someone else told me that their father fondled them between their legs, was always nude with an erection (even nudest camps that allow children have a strict background check and continuous checking though i dont agree with it, but anyway), touched them and it felt wrong, etc, would I feel that was wrong and abuse? I've always been able to see that it was abuse if it happened to someone else, I just justified it for me as not being like everyone else (and other stuff).
The other biggest thing was "is it possible to be abusive? Is it just possible?" Opening my mind up to it being possible. Just possible.
Yes, I call that abusive and pedophile behavior. But you dont have to see it as such right now. Just open yourself up as being possible. You can work on the remainder.