The new documentary “Road Diary: Bruce Springsteen and the E Street Band” is for the true believers, if only because faith is the central tenet of every Springsteen fan. Faith in the Boss — his decency, his groove, his dedication to a half-century of bringing it — but also faith in the struggles and resilience of the ordinary person, and faith in rock-and-roll as a generation’s holiest form of transcendence..
