The political party they support, Republicans, has held congressional power for 16 of the last 20 years. Conservative Republicans have been President for more than half of those years.
Yet they'll grievously complain they're being socially and politically persecuted.
The country is changing and they refuse to accept that. The U.S. is becoming more diverse, urban, and less paternalistic. The poor white male is terrified of that reality. His cultural reference is mid-20th century, in the 2nd decade of the 21st century, he's the literal definition of regressive right-winger. They've been party to the persecution of others, persecution that they're irrationally, anxiously, afraid of happening to them.
A blurb published in the NYTimes:
*'Let it die'
"I'm from Appalachia, where getting into the working class was an aspiration. I was raised "up the holler" and know the culture intimately. You have no idea the anger, self-righteousness, bigotry, and willful ignorance you're dealing with. I have seen a blighted small town use a corrupt sheriff and judge to run off a business owned by a black man. I have been present when an entire community looked the other way when a gay couple was burned out of their home.
They support Trump and the reason is simple. He acts as they would if they had money. There is no saving this culture, nor would you want to save it. The people who could have revitalized it have either left for better opportunities or been run-off. It's a breeding ground for hatred and despair, dying with a bible in one arm and a heroin needle in the other. Let it die." ~ Peregrinus Erehwon*
There is no use trying to "understand them", hear them out, or be civil. They're not willing to reciprocate. They're bunkered in their right-wing hate bubble, they're like cultists, and everyone else is their mortal enemy.
No, one doesn't seek common ground with those conditioned by lies and hate. That only lowers the credibility and intellect of the whole.
Calling them -deplorable- is a fair characterization.