The correct answer is:
1) the Ku Klux Klan
The Ku Klux Klan is the oldest and most infamous American hate groups. Although black Americans have been the Klan's main target in a long history of violence, it was also known for attacks on Jews and immigrants. Lynchings, tar-and-featherings, rapes and other violent assaults on those challenging white supremacy became a trademark of the Klan.
