"At this point in history, American evangelicals resemble the Israelites at various dangerous moments in the Old Testament: They are blending into the surrounding heathen culture, and having ever more trouble figuring out where it ends and they begin. In politics, and in business, they've mostly gone ahead and joined the existing networks. With pop culture, they've instead created their own enormous 'parallel universe,' as Daniel Radosh calls it in his rich exploration of the realm, Rapture Ready! A Christian can now buy books, movies, music—and anything else lowbrow to middlebrow—tailor-made for his or her sensibilities. Worried that American popular culture leads people—and especially teenagers—astray, the Christian version is designed to satisfy all the same needs in a cleaner form.
"The problem is that purity boundaries are hard to police in the Internet age. Show a kid a Christian comedian, and soon he's likely to discover that the guy is a pale imitation of this much funnier guy—Jon Stewart—who's not a Christian at all, and doesn't even like Christians. Which might then lead to a whole new set of anxieties, such as: Why are Christians so constitutionally unfunny? And, what is the point of Christian culture, anyway?"
—Hanna Rosin, "Pop Goes Christianity," in Slate. For answers to her questions, I recommend Barbara Nicolosi's writings.
Thanks to Scott Johnston for the tip.