I saw the movie a couple of weeks ago and I found it fascinating. I think the overall theme of the movie was about how we form opinions about different races or groups based on stereotypes.
My father is black and my mother is a white French Canadian. I remember my dad saying the one comment he and my mom got was that he was marrying the devil. Me personally, I've been called zebra and oreo (by other blacks not whites). I've had people tell me I didn't know who I am because I am of mixed race. I had some bad times as a teenager, but I've learned that some people are just idiots. I'm proud of my mixed heritage (which is also Cherokee on my father's side).
I get a good laugh out of folks who try to figure out what race I am, some think I'm Hispanic, Asian....and some dude thought I was from Morocco