They are human. We need to accept that and understand that monsters are among us and are created by other monsters. Pedophiles were abused as kids. The abuse cycles forward.  Not all victims become abusers but we all have damage from it. Would you kill the innocent too? It isn't black and white. My own abuser was abused as a kid by my grandfather. As was my mom and her sisters.  He needs to be locked up and kept away from women and children. Perhaps offered the choice of chemical castration. He needs therapy. He needs help.  I can't say now I want him dead though I did most of my life and if he threatened me again or my child I wouldn't hesitate to use lethal force in defense. There is a big difference between that and murdering people because of brain scans we don't really understand.