Damn. At first, I was thinking, OK well maybe more racially mixed areas are also areas in which voter participation is high and generally encouraged. But the examples they gave seem to suggest these findings exist separate and apart from those situations.
On a national level, this would explain the Tea Party.
I know I am a broken record with my prediction that the wingnut will dominate the Republican primary this year, not a (perceived) moderate, but I don't think white anger and fear can be underestimated. This study supports my prediction that angry white rural men will be coming out of the woodwork this time.