I spent my adult years in the military and then sales, management and in the trenches. In all of those circumstances, my co-workers and fellow soldiers were a very diverse lot. I can't think of many instances since I was 18 that were not spent in a mixture of the races. The military is certainly that way as are most of the car stores I worked for. In all that time, I can count on one hand the times I heard the "N" word used that wasn't in a song coming out of a radio, even when there were no black people present.
On the few times it did happen, the individuals were confronted and ostracized. And in the car business, once that happens, you're gone fairly quickly. We can be a brutal bunch to people we don't care for. I think you have a skewed perception of white conservatives, my experiences are completely different than what you describe. Maybe I've just been lucky, but I've lived and worked with Conservatives in California, Oregon, Nevada, Colorado, Missouri, Virginia and most recently, North Carolina, which represents a fairly inclusive cross section of this country.
I just haven't seen or heard this rampant racism, at least in the magnitude you're describing. And I've been registered as an Independent since 1992, when I voted for Perot. There is no question I'm a fiscal conservative and vote Republican a majority of the time. As I said, I've held my nose when doing so many times, but since I don't feel a third party vote does anything except elect Democrats, I haven't had much choice.
Edit: Just wanted to add one thing, I've said it to many people before, but I think you are guilty of it as well. Most of the people on this forum that make these accusations of racism, apparently don't understand the word. What you guys mean to say in most cases is "prejudice" not racism. Furthermore, by continually throwing around the race card and making blanket accusations, you are far more guilty of prejudice than the people you're accusing.