Does that mean they can never be saved then?Would serial killers consider their victims enemies???????????
I'm pretty certain that serial killers have another agenda, which does not consider anyone else ever...
They surely are psychopaths, sociopaths, people with extremely serious mental conditions. These people are a fascination for psychologists and psychiatrists purely because they have have no 'normal' human responses to their world.
I have absolutely no idea why someone would systematically kill other people.