From what I've seen, Korean Christians are a lot more full on than Christians I have encountered in other countries. Example:
* First a disclaimer: I lived in Korea for 4 years, and I am married to a Korean.
One of my wife's relatives passed away while we were living in Korea, so we went to attend the funeral. Approximately half of the family was devout Christian, and the other half were mild Buddhists / agnostics. Because the person who died was Buddhist, it was decided by the Buddhist side of the family to have the funeral in a Buddhist format, which might I add, has been practically the cultural standard for hundreds of years in Korea.
But the Christian side would have absolutely none of it, not even to be respectful to the Buddhists, which was a source of contention at the funeral. They waited until the end of the ceremony, not taking part in any of the prayers, or even the the respectful bows that are common enough, then begun their loud prayers and other Christian themed actions.
I am an atheist, but I knew better than to shove my (lack of) beliefs upon others, and just go with the flow at the funeral, why can not others do the same? To this day that funeral is still a source of discontentment between the two sides.