The Black Klansman (1966)

Tells the story of an African-American Jerry Ellworth who is a Los Angeles jazz musician with a white girlfriend. In an Alabama diner during the Civil rights movement a young black man attempts to exercise his civil rights by sitting at a local diner. When the Ku Klux Klan learn of this, they firebomb a church, killing Jerry's daughter. When he learns of this, Jerry moves to Alabama to infiltrate the group responsible for his daughter's death. He becomes a member of the inner circle, befriending the local leader and his daughter, and soon exacts his revenge.

The Black Klansman is a drama movie featuring Richard Gilden.

The Black Klansman is currently streaming for free (ad-supported) on Cineverse and it's also available on Midnight Pulp.