BlacKkKlansman
CHARLIE WACHTEL & DAVID RABINOWITZ and KEVIN WILLMOTT & SPIKE LEE 2018
IMDB: https://www.imdb.com/title/tt7349662/
Ron Stallworth, an African American police officer from Colorado Springs, CO, successfully manages to infiltrate the local Ku Klux Klan branch with the help of a Jewish surrogate who eventually becomes its leader. Based on actual events.