Newsweek’s cover story, written by popular author Andrew Sullivan, encourages Americans to “forget the church” and just “follow Jesus.” According to Sullivan: We inhabit a polity now saturated with religion. On one side, the Republican base is made up of evangelical Protestants who believe that religion must consume and influence every aspect of public life. On the other side, the last Democratic primary had candidates profess their faith in public forums, and more recently President Obama appeared at the National Prayer Breakfast, invoking Jesus to defend his plan for universal health care. The crisis of Christianity is perhaps best captured in the...