In the last two decades, a bizarre and violent musical subculture called "Black Metal" has emerged in Norway. Its roots stem from a heady blend of horror movies, heavy metal music, Satanism, Paganism, and adolescent angst. In the early-mid 1990s, members of this extremist underground committed murder, burned down medieval wooden churches, and desecrated graveyards. What started as juvenile frenzy came to symbolize the start of a war against Christianity,...