The Korean Christian culture requires some removal from normal Korean society and thought processes that are integral to the traditional culture. It is a culture where shamanism is extremely prevalent and it is easy to see its remnants throughout social practices and attitudes, but even when we are looking at life through a non-religious element we see certain attitudes towards sexuality that can undercut even Western secular concepts about it in a way that outright atheism cannot. Basically, there are so many aspects about traditional Korean thought that are rooted in outlooks based in Eastern religion that it being a Korean Christian means a separation from tradition.
This morning I woke up and watched a Japanese Christian describing one of the biggest & greatest barriers to entrance into Christianity as the fear that Japanese have of not meeting community expectations and expectations of their ancestors to honor them, and it can also be daunting in general to hear that their ancestors may not be in heaven... it grinds too much against them. This is solved in Korea with many people having realized that replacing certain aspects of the traditions with Christian prayer fills the gap between Christ and the East and still fulfills cultural obligation. Probably the same can occur in Japan, but that threshold just has not been hit.
Probably all civilizations have had issues like this which separate it from Christ, and this is also why even Jewish religion, with its monotheism, stuck out like a sore thumb to its neighbors. Rejecting the worship of traditional spirits, ancestors, etc., and the many deities that are thought necessary to maintain life and happiness, and eventually even replacing this with the very Christian idea that you can pray but maybe it's only going to bring you persecution, shows such a radical departure from traditional ideas about life.
I will have to return to the 'Chinese' part at the end of this post. But first, back to ideas about Western civilization...:
Because we are based on the rejection of pagan civilization, modern Western civilization is liberal as it is liberating individuals of previous obligations and boiling religion down to a far more intimate, personal experience. Moreover, Western civilization is highly self-critical, and it encourages also the criticism of that which is around it as a means of separating oneself from the fallen world.
You can also credit Christianity with making the West hyper-creative, even outright countercultural and revolutionary. For in Christianity, the worldly culture is not a definitive commentary on truth, the truth is something that transcends the world, and so disposal of conventional cultural understandings, of common "truths" and even common "sense" and traditions is seen as not just as excusable, but even praiseworthy.
In short, Western civilization was able to redefine what makes a civilization due to the influence of Christianity... It was able to create a whole new concept of governance and social ontology that is highly transient and contractual and noninvasive because Christ blew up the mythos surrounding power and redefined interpersonal relations, removing traditional emphasis on blood ties that was overly clannish and localized.