Rock music, once largely the domain of hedonism and debauchery of every kind, is now populated by a surprising case of upstanding and in many cases devout citizens who create all different kinds of music and oftentimes are animated by religious ideas that would have been completely alien to rock stars of yesteryear. The religious and religiously influenced are now commonplace in rock 'n' roll (Kendrick Lamar, Chance the Rapper, Katy Perry, 21 Pilots)...