My point above about self-segregation didn't get a reply. It's not a conspiracy against Christian music. What happened was that evangelical/fundamentalist Christians have partially withdrawn from the mainstream culture. They think that mainstream music is too sexual, too violent, not dedicated to Jesus, etc., so they created their own music (and other entertainment) to meet their own special requirements. They also have their own schools, their own summer camps, and so on. In a way, it's an admirable do-it-yourself spirit. On the other hand, it can be a bubble, in which some people are getting a very distorted view of those outside of the evangelical/fundamentalist Christian subculture.