Next week, the Southern Baptist Convention will hold its annual meeting. It’s the largest Protestant denomination in the country, and, as the group gathers to elect a new president, it is facing a crisis of identity. At issue is critical-race theory, which the presidential candidate Pastor Mike Stone and many other conservatives have called an extra-Biblical and even demonic source of division and strife. Eliza Griswold has been reporting on a moral crisis within the S.B.C. and emerging fissures between American evangelicals. In 2017, the Reverend Dwight McKissic put forward a resolution condemning alt-right white supremacy, which failed twice before being passed. “It was a feeling of shock. I was stunned, actually,” he told Griswold. “Black pastors were coming to me saying, ‘We’re out. We feel like the Other here.’ ”