I, personally, love cultural diversity. I don't fear people with darker skin than myself. I love the sound of foreign accents and languages (and if I were better off, I'd love to travel and meet them). I don't fear or dislike gay people or those of a different religious affiliation (I happen to be Episcopalian, if you're not, good for you.)
My daughter recently gave me a Mexican Talavera pottery coffee mug that she and my wife picked up at a local Mexican market and panaderia. I place we love to go to for the Mexican "real sugar" sodas, sweet breads and interaction with shy but friendly hispanic owner/operators. My small and heartfelt bit of protest this weekend came in the form of this watercolor sketch. It's the cup my daughter gave me last week and it's a beautiful piece of work in its own right, just like the people that made it.
Walls don't just keep people out, they keep people in. When you put one up to keep people out, you only succeed in building a bigger prison.