Over the past five years, in fact, it has become increasingly clear—even to some conservative Christians—that fundamentalist churches face a widespread epidemic of sexual abuse and institutional denial that could ultimately involve more victims than the pedophilia scandal in the Catholic Church. In 2012, an investigation at Bob Jones University, known as the “fortress of fundamentalism,” revealed that the school had systematically covered up allegations of sexual assault and counseled victims to forgive their attackers. Sovereign Grace, a network of “neo-Calvinist” churches, has been facing multiple allegations of child molestation and sexual abuse. In 2014, a New Republic investigation found...