J. Spencer Fluhman, an assistant professor of history at Brigham Young University, is the author of the forthcoming book “ ‘A Peculiar People’: Anti-Mormonism and the Making of Religion in 19th-Century America.”

MOCKERY of Mormonism comes easily for many Americans. Commentators have offered many reasons, but even they have found it difficult to turn their gaze from Mormon peculiarities. As a result, they have missed a critical function of American anti-Mormonism: the faith has been oddly reassuring to Americans. As a recent example, the Broadway hit “The Book of Mormon” lampoons the religion’s naïveté on racial issues, which is striking given that the most biting criticisms have focused on the show’s representations of Africans and blackness.

As a Mormon and a scholar of religious history, I am unsurprised by the juxtaposition of Mormon mocking and racial insensitivity. Anti-Mormonism has long masked America’s contradictions and soothed American self-doubt. In the 19th century, antagonists charged that Mormon men were tyrannical patriarchs, that Mormon women were virtual slaves and that Mormons diabolically blurred church and state. These accusations all contained some truth, though the selfsame accusers denied women the vote, bolstered racist patriarchy and enthroned mainstream Protestantism as something of a state religion....