Hi! I`m searching for one movie that I saw in late 1990

About 2 friends - white guy and his sisters black guy friend. They are driving and one moment the car is broken. And the white guy goes to the nearest house and ask for help. Door opens girl and she give him glass of juice, but than comes black guy and the glass of juice is falling from girls hand. Because hers relatives is nazis and in big house outside is hanging a black man.

Sorry if my english is not correct.