It is titled Undercover Christian.
In it he talks about an article he read about a non-Christian that went undercover as a Christian university and discovered that he could not communicate with the conservative Christian culture there.
The point he is trying to make in the article is to question how Christians have gotten to a point where they can no longer relate with the rest of the human race.
Here is one of the quotes from the post:
[the Christian subculture] puts us on an island away from people we are commanded to love and serve."
Brilliant words in my opinion.
By the way, the title of this post comes from part of another quote in the post.