Yeah take suicide bombers for example... Why do they do this... Because they believe if they do this for their God, their country they'll be rewarded with so many virgins in the afterlife. Now that's a great thought. Always think back of Billy Connolly. Not maybe the perfect place to insert a joke but I just have to laugh when he does his impression of a suicide bomber instructor: "Right men! I will only show you this once!" Anyway, you get the picture how their faith influences them to do these things, though these men would already be violent in another way if there was no reward in the afterlife, but at least they would have less motive to do these extreme violent actions. Religion or faith... adds a motif to do either good or evil... Maybe not as black and white as said before, but that's just the case. You see it not only in the event of the 12 year old girl, but in war and other events.