Much of the discourse about this issue presupposes all people agree as to what is "right" and what is "wrong." Even the most cursory overview of world culture will show that right and wrong are subjective. For some, let's say tradional Ethiopians, FGM is the correct and proper thing to practice. For some Afghanistanies, it is wholly correct for a 13-year-old girl to be the second bride of a 53-year-old man. Look at our own debates about mercy killing (murder?).
I'm not saying we should abandon the prosecution of "justice" because morality is subjective, but we should at least admit that is the case and come up with some universal criteria based upon the nature of the illegal act and its effect on the victim; yes, a more rational approach. Keep morals out of it.