I think defining Trump voters is a good deal more complicated then just labeling them racist or okay with racism. In fact, as much as I dislike the idea of Trump serving as president, and as damaging as I think his campaign has been, I'm not sure I really understand the charge he is an overt racist.
It's complicated. Consider Rick Abraham, a second generation Arab/American, who is Muslim, who plans to vote for Trump. He lives in West Virginia, which used to be solidly Democratic but is now a state Trump is expected to carry. Abraham's a Republican (who voted for Obama) and this time around his first choice was Carly Fiorina, but as he realized how little support she was garnering he switched to Ben Carson. Now he not only supports Trump, he has a huge "Hillary for Prison" display on his store. It's very popular and people often stop and take selfies in front of it:
As for Trump's more extreme positions Abraham had no problem with it:
Abraham also worries about immigrants -- especially Muslim -- who do not want to assimilate. That it's okay to value your heritage and honor it, but you still have to want to be an American, become an American.
I guess Trump's allure seems obvious when you live among economic collapse. I've been in a natural Trump stronghold in another part of WV through this election, so it is difficult for me to imagine how much harder Trump's appeal is to grasp if you live in a place with economic growth.
Even so, I think the popularity of Trump in WV is overblown. The article describes a county that went 69% for Romney. Heavy GOP support in the coalfields isn't a new thing.
Five thirty eight is currently projecting Trump at around 57% of the vote statewide in WV. Romney got 62%. Trump support is more loud than widespread.
WV might be one of Trump's better states, but that isn't complicated at all. Trump says pro coal things, Hillary is fairly seen as anti-coal. Most of West Virginia has a pathological love of the coal industry.
It is the same as to pro-Trump pockets anywhere, whether the industry is coal, steel, or whatever. When the mills close, and/or the mines shut down, and there is little else around, it is hard to overestimate the economic and psychological devastation. My community has become borderline dystopian since Weirton Steel collapsed a bit more than a decade ago. The other major plant in town closes in a few months, so it promises to get worse.
Trump promises to fix this, and I have trouble really faulting people for not seeing that his solutions are nonsense. If you live in this sort of economic hopelessness, Trump being a deplorable jerk is more or less frivolous detail if he carries the promise of restoring the place to its former glory. Heck, if I thought that Trump was actually capable of revitalizing heavy industry and creating good jobs in depressed areas, I'd be tempted to overlook his being completely horrible otherwise. So I can't really judge those who support him for that reason for not having the time, energy, and educational background to see through his nonsense.
The unfortunate thing is that the racism and such is sort of sticking. "Come for the promise of economic relevancy, stay for the bigotry" seems to more or less be the effect. Economic populism doesn't have to include this baggage, but it all too often seems to.
(The overall shift of WV from a mostly Democratic state to a Republican one has nothing to do with Trump. It tracks the collapse of organized labor as as political force.)