>>512434352
I don't, I said it's exceptionally rare. If someone does have a genuine change of heart firstly that is between them and God alone, we are not obliged to care for them when they have proven to be a danger to the rest of us. Secondly if a terrible person is saved then that is indeed a good thing. Your problem is that you half ass this hypothetical situation and don't actually entertain Christianity fully, you want to have your cake and eat it too by looking at it through a secular lens. If you actually entertained Christian theology you would understand that this life is in fact ultimately meaningless in that regard because this place isn't our home, and none of us are going to care about any of the evil that was done to us here in what was not even the fraction of a fraction of a fraction of the blink of an eye compared to eternity in paradise.
Augustine detailed this concept for you in autistic detail centuries and centuries ago: killing in self defense is allowed. If we don't intervene with lethal force to prevent a great evil from happening we ourselves become culpable for that evil. We aren't obliged to let your hypothetical 100x rapist reach that number, we have divinely sanctioned lethal power that can be exerted over him to prevent it from happening in the first place.