Studies have shown that people do judge others based on how they look.  Racism is a sort of collective form of that type of behavior.
Frankly, I have a real problem with this.
I was a funny looking, cross-eyed kid until 5 surgeries made me look normal.  Being a Latina in a redneck community didn't help, either. I was very overweight, too... and man, the kids were mean as piss to me.
When I blossomed and they wanted to be 'friends' with me, I saw through the BS.  I was angry as he11 about it, and was quite a rebel for a few years.  I hated them all, the shallow bastards! 
 
The one thing I learned from that is to look deeper than the surface.  If everyone could do that, there wouldn't be racism.  Unfortunately, I don't know of any real way to explain this to people who insist on judging others based on appearance, including color.
