I don't talk to those kinds of people! But I guess if I had to and I guess if those a-holes asked for a recommendation, I'd recommend To Kill A Mockingbird.
To be completely honest, I couldn't think of a good answer to this one on my own, so I Googled it. The problem is - I've read so many books that I think are extremely important, and that deal with a variety of cultures and race relations within. But they all seemed like something an ignorant/close minded/racist person would twist to fit their own agenda. I mean - that's the problem with those kinds of people.
Purchase Now from Amazon: To Kill a Mockingbird