Crash is an outstanding film, definitely worth your time. Strong. Powerful. I am not sure that the film is "about racism," although racism is dominant character. It is more about us.
Roger Ebert wrote, in his review:
Not many films have the possibility of making their audiences better people. I don't expect "Crash" to work any miracles, but I believe anyone seeing it is likely to be moved to have a little more sympathy for people not like themselves. The movie contains hurt, coldness and cruelty, but is it without hope? Not at all. Stand back and consider. All of these people, superficially so different, share the city and learn that they share similar fears and hopes. Until several hundred years ago, most people everywhere on earth never saw anybody who didn't look like them. They were not racist because, as far as they knew, there was only one race. You may have to look hard to see it, but "Crash" is a film about progress.
The language and situations are strong, terrifying, horrifying and enlightening. If my children were little I would be torn between feeling though should not see it, and feeling that they must.
Rent the film, get some friends together, see it together, and then talk about how seeing this film might help us in the redeeming, reconciling, and healing of the world -- especially ourselves.
The Lord be with you,