In the distant past most humans only saw people different from themselves if they were being invaded by enemies. I guess that's why so many people today are still uncomfortable and even afraid when they encounter anyone who is different.
Racial prejudice is only one thing that shows this discomfort. I've been amazed to see lots of instances when people seem to be afraid of somebody with special needs.
A few years ago when I was trying to choose a tag line for my website my friends helped me figure out that most of my writing involves helping people understand and accept others who are different. For that reason the tag line I chose is "Opening Eyes, Opening Hearts."
If only we would all learn to look below the surface we'd realize that most people are really not that different from ourselves. No matter their culture, background, political views, economic situation or physical problems, we are more alike than different on the inside. And if we would only all realize that, the world would be a much better place.