A white supremacist is an individual who believes that white people are superior to people of other racial backgrounds. This ideology often leads to the promotion of discrimination, segregation, and violence against non-white individuals. White supremacists may advocate for policies that favor white people and seek to maintain or restore a perceived racial hierarchy. White supremacist groups, such as the Ku Klux Klan and Aryan Brotherhood, have historically engaged in hate crimes and acts of terrorism. These groups often use propaganda to spread their beliefs and recruit new members, contributing to a culture of racism and intolerance in society.