The House select committee investigating the January 6, 2021, Capitol takeover have subpoenaed a wide variety of people, from Trump officials to grassroots activists. And on January 19, 2022, two more were called: Nick Fuentes and Patrick Casey, the leaders of the “Groyper” movement, a white supremacist outgrowth of the “alt-right.” Fuentes believes that “genocide” is being committed against white people, and rails against immigration, the “LGBTQ agenda” and feminism. While relatively minor characters on the national stage, Fuentes and Casey are important to know about for three reasons. The first is that the Groypers are one of the more...