I’m unable to imagine a reason why decent people might be compelled to rape children, let alone serially.
You can see some discussion of that in the Australian Royal Commission into Institutional Responses to Child Sexual Abuse (2017)
* https://www.childabuseroyalcommission.gov.au/final-report
There is the position, of course, that a sexually abused child that reaches teen years or adulthood is no longer a "decent person" .. which is an interesting transition to dwell on.
Someone abused as a child who does sketchy things in their early 20s is tragic. Someone doing the same when they’re nearly 40 is a whole lot harder to dismiss. Like, you don’t make it to that age without hearing a lot of people along the way saying not to rape children.
You're right to flag ongoing and persistent shitty behaviour as unacceptable - even assigning blame there gets problematic as there absolutely is an element of "would they be less bad had they had more support on escape", but you can't be giving a pass forever.
Bloody Trolley problems .. this is one of several areas with no good choices, no easy solutions.
No one wakes up and thinks “I want to suffer today of _____.” [1] AndI want others to suffer along with me.
That said, perhaps the universe is binary? Perhaps evil, pure evil does exist? Perhaps there’s no to stopping evil than “just say no”? It’s hard to say.
[1] Insert mental, physical a/o spiritual illness here.
Victims of sexual abuse thus often are haunted by “fantasies” of abuse but avoiding the victim position; the trap is to identify with the fantasies. All too often, they’ve been told it is their fault, they wanted it etc, so the imagined replay “proves the original perpetrator right”.
The only way to break the circle seems to be to fully go into the fantasy and process the victim position, with support of a well-meaning presence (typically a therapist but in another reality it could be friends or family).
You find an excuse for MURDER? You are definitely not a decent person.
I’m not talking about random “my neighbor disrespected me so I killed him” idiocy. Just saying, I can at least imagine situations where, even if he shouldn’t have done it, if I were in the jury, I’d probably vote to acquit. If you can’t, you are definitely not a decent person.