Studying the types of messages hate groups spew online helps researchers understand the groups' persistence. Westend61/Westend61 via Getty Images Hate communities often flourish online for years, raising the question of how they persist. My research team has found that powerful stories keep members of a hate group galvanized, either by repeating the story over and over or by constantly adding fresh accusations and interpretations to it. I’m a computational social scientist who studies social an