This chapter overviews the characteristics and circumstances predisposing people to lead or join hate movements with a particular focus on the virulent anti-Semitism that united figures such as Father Charles Coughlin, Charles Lindbergh, and Henry Ford. By analyzing these figures and their followers, we extrapolate practices common among hate groups. After identifying character traits and risk factors (e.g., political and economic insecurity), we discuss their more modern manifestations. First we clarify our definition of hate groups as defined by the Department of Justice, Federal Bureau of Investigation, and Southern Poverty Law Center. We then extrapolate from these definitions to show how they align well with our definition of a cult. Following this, we acknowledge the challenges that accompany hate group designation while concluding that it is still vital for tracking modern-day hate groups and discrimination. We conclude by acknowledging the continued threat of hate groups and the presence of risk factors seen throughout history, such as global public health emergencies. We also discuss challenges unique to the technology age, such as epistemic bubbles and echo chambers. In summary, the chapter provides an outline of how hate groups come to be and provides a discussion of their continuing threat in society.