Sometimes I wonder if these people live in caves. Perhaps they live in mental caves that they don't want to come out of. Because listening to their comments, it seems as if they are detached from reality. Part of the problem seems to be that they are likely FAUX News viewers, and FAUX News perpetuates hate, misinformation, rumors, etc. It's not a legitimate News organization. FAUX and its diehard viewers tend to create their own reality. These people (rural White Americans) also tend to move in their own circles, and seldom venture outside of their own echo chamber - Not all of them of course...(Obama has been gaining support in rural America), but a significant portion of rural White Americans seem to fit that mold. Therefore misinformation tends to be reinforced just by default when these people talk to one another. So you end up with a downward spiral of ignorance, hate, and xenophobia in certain parts of the Country.
Does isolation create this problem? 50 years ago (or more) I would say that isolation was a big part of the problem. But it's 2008, and it's a wired world now... people in the most remote corners of the earth should be in tune with what's going on... Satellite TV, Satellite Radio, Cable, Internet, Mobile Phone service (mobile internet)...are all over the place. So something else has to be going on to lead to this problem. I think it has more to do with (as I suggested) people's tendency to stay within their own echo chamber.
See Report from Al Jazeera News