You're tying a group that's not a monolith with another group that's not a monolith and making a number of assumptions in both cases. Not only are a lot of rural people left wing and not at all racist. But I've yet to meet a single rural person that married their cousin, but I have met a city person that has.
Alternatively, the other week I was riding a taxi with this black guy who was as left wing as they come, had very progressive ideas, and was Trump's biggest fan, he was absolutely obsessed with Trump. He thinks there is some big conspiracy that makes all other politicians evil and Trump is going to save us.
When you make basic generalizations about groups of people you increase divisiveness and make the problem worse. Rural people know city liberals look down on them, and that pushes the divide further and further. I grew up in a heavily liberal rural area that is becoming more and more right wing, and people exactly like you are responsible. People like you made that happen. Be better.