Now, I’m just a white guy from Australia who’s only visited the US a few times, so there’s a strong element of “What the hell would I know?”[*], but still … I suspect that if you want a quick, visual introduction to race relations and the issues facing non-whites in America, you would not do too badly by only watching three things:
- My Big Fat Greek Wedding [IMDB , Wikipedia ]
- The Wire [HBO , IMDB , Wikipedia ] (especially season four )
- La Misma Luna (English title: Under the Same Moon) [Fox Searchlight , IMDB , Wikipedia ]
[*] The answer, of course, is “probably not very much,” especially if you subscribe solely to ethnographic  or other immersive techniques of sociological fact-finding, but since my wife grew up as an Hispanic immigrant in the (28% African-American, 6% Hispanic ) state of Georgia, I work on the assumption that even if I have no clue, she’ll yell at me if I say something entirely stupid.