I film I liked it very much recently was “Crash”, the last but one film of the director Paul Haggis. The stories, because there are a few stories that go mixing little by little, set in the United States. Finally they become an only story that tell us about the troubles of communication, or maybe lack of communication and distrust of people that are very different but that live together.
It’s a bit sad film but I recommend you very much, if you don’t see it yet. I think it can teach us a lot of things about coexistence with people of different races and cultures.