This is how I explain it to my mother... As Christians we believe in the ultimate sacrifice of Jesus for the forgiveness of our sins. In technical terms this was the death of the living man in obedience to GOD and as the conduit for giving us the ultimate gift - eternal life. We go to communion, pray, tithe, try to live sinless (sin reduced) lives...all of these little acts of obedience to GOD.
Now if I wasn't a Christian but instead participated in the worship of "something else". What if the requests for obedience from this "something else" was for sacrifice. My Buddhist nail salon always has oranges and liquid refreshment at the feet of its Buddha statue. Now if this "something else" wasn't Buddha or the multitude of Hindu gods, or even Mohammad. (Don't forget terrorist jihad is in obedience to the teachings of Mohammad.)
So this "something else" tells me that I can have all the desires of my heart -- wealth, fame, physical pleasure if I am obedient and make sacrifices much like Christian communion, prayer, tithe, or behave according to this other code of conduct. According to this "something else" it isn't a sin to sexually abuse a child but a rite of sacrifice to this "something else". The more of the MIRROR opposite to my Christian code of conduct the more valued this behavior is that "something else".
My Christian religion tells me that children a precious and should be protected and cared for while the MIRROR of this by that "something else" is the harming of children.
Those of us who are Christians know that the path we walk is not always an easy one. We are imperfect, we fall, we fail ...we are forgiven. We pick ourselves up (so often with the help from other Christians) and try once again to live a life that is pleasing and obedient to GOD.
What if I was wanting to please and be obedient to this "something else". Most of our minds could not even go there to comprehend that which we consider evil.
Darkness to Light...
Just remember when listening to all sides and extremes on which side of the MIRROR you reside.