Brother John (1971)

Visiting his Alabama hometown for his sister's funeral, an enigmatic black man, John Kane (Sidney Poitier), is appalled by the discrimination and hatred he witnesses. There is a strike going on at the same time as the funeral, and some in the community assume he is an outside agitator. In reality, Kane is a messenger from heaven sent to assess mankind's worthiness of redemption. Although dismayed by the atrocities he sees, Kane is not ready to give up on human beings just yet.