Just know one thing, Im sure people destined to become serial killers dont know that, and certainly wouldn't worry about becoming a Serial Killer. :)
And I if you beleive what Christians say then God Loves everybody, including people born without Empathy. But something for people that beleive in God to think about, If there is a all-loving god then what about hyenas? I mean Hyenas disembowl their victims, a HORRIBLE way to die so If god created animals he created them so why created them to do that?