They don’t care about their own self-interest. They are stupid and like it that way. The reason they love Trump is because he is as stupid as they are in sticking it to “the system” and declaring bankruptcy over and over as a business practice. He is the ultimate knuckle dragger and they love it. He is an abject failure of capitalism and they believe in it as if a religious doctrine.
They like being stupid along with their sexually exploitive pastors and maintain cultural stupidity as a profit motive.
To prove my point further, Knuckle Dragger Extraordinaire is the US Speaker of the House. His entire district is a failure and example of how “the party” is served before the people.
The Speaker of the House should be an example of how to legislate best to serve the people. The current Speaker is none of these things.