Don't you think this is an overstatement? Legislative majorities determine national policies. I think that Christians are less than 50% of the South Korean electorate, so the Christian vote cannot by itself do anything.
South Korean churches are financing the conversion of Korean populations in Manchuria, which is very important.
The US is more of a Christian nation than South Korea. Has this fact done much good in Darfur? Aren't those people suffering over there our brothers and sisters? Does that failure mean that US Christianity is a "fraud"?
US Christianity is absolutely a fraud. I doubt seriously that the US has a richer spiritual life in Christ than Korea. Our Christianity is slathered with prayers for comfort and wealth, not an earnest desire to sacrifice our lives in service to the living Christ.
The Way of Jesus is not a democratic process. It is a witness to one's condition. That is all it is.
When my witness is not for self preservation but for personal sacrifice that others may find hope it begins to reflect the life of Christ.
We are taught in our churches that following Christ leads to success and happiness. Not in this world! Following Christ means standing against evil.
Where do you see that happening? It is uncommon but it is there. Seek out those who are surrendering their comfort to serve those in desperation and you will find Christ.