http://www.moral-relativism.com/
Moral relativism is the view that ethical standards, morality, and positions of right or wrong are culturally based and therefore subject to a person's individual choice. We can all decide what is right for ourselves. You decide what's right for you, and I'll decide what's right for me. Moral relativism says, "It's true for me, if I believe it."
NAMBLA uses moral relativism to justify their disgusting and criminal practices. In essence, it goes back to the serpent whispering, "You shall be as gods," because a god can decide for himself questions of right and wrong.