Above and beyond all the other rhetorical feces that has spewed forth from the sphincter of your mind, your whole premise -
They are, by all appearances, a great Christian nation
is totally incorrect. The Christian population of South Korea is slightly more than a quarter of the population (roughly
27%). The laws and social mores of South Korea are not historically rooted in the Christian faith, but rather in the Koreans own unique traditions, exposure to outside cultural influences and the adaptations and modification of Western jurisprudence.
Also, it is quite apparent that you are completely ignorant of the situation, past and present, which exists on the peninsula - get a clue before you comment! While youre at it, seek some professional help. You seem to be a very misguided person and potentially a danger to yourself and others.