Cracked made a list of the Top 5 Most Unintentionally Racist Movies About Racism, and it's actually pretty good (yes, Crash is on there). Regarding American History X, for example: "This is a movie whose entire message of forgiveness and reconciliation hinges on the idea that a murderous skinhead can be redeemed because a black guy in prison can be funny while washing the underwear of rapists and child molesters." [Cracked]