Guys: Would you ever rape and murder a girl?

[God of Mr. Hanky]

But what  reason is there to have the empathy not  to rape and murder a girl?

There isn't any reason that isn't contingent upon your normalcy as a human being.  As others have already told you, if you're a sociopath we'd like to see you remain a xtian or, better, have yourself committed.

He needs to be in some sort of program, even if it's just frequent church attendance. The worst of the sociopaths are those who go their own ways so they can feed their delusions until they believe that whatever they feel inclined to do is their god's will. That's a more dangerous sociopath than one who's atheist!