Yes. The icky emotional reactions explain the ubiquity of the ‘Trump won because working class/rural whites felt ignored’ theory, as you point out. And the voting patterns (as you also point out) do not support the ‘it was the working class/rural whites’ theory.
Coates may have been aiming at being incendiary (and newsworthy) by using “white supremacy” to stand in for the entire range of positions that led various voters to give the nod to Trump. And of course that gives many readers an opening to reject Coates’ thesis: it’s easy to pretend he was claiming that every Trump voter either wears the KKK robe, or wants to. That, of course, is clearly false.
But that’s not the claim. The claim is that many white people who voted for Trump did so not because they felt ignored or even because they genuinely believed Trump would improve the economy–but instead, because Trump stood for white privilege (which is how I would put it) or for white supremacy (which is how Coates put it).
Trump voters fell along a wide range:
[ul][li]the overtly ‘white supremacists’ who do belong to the KKK and Stormfront and the skinheads [/li][li]the overtly 'white supremacists who belong to organizations named with plausible deniability: the National Policy Institute, the Sons and Daughters of Liberty, the Council of Conservative Citizens, etc.[/li][li]the people who would never join either of the above types of organizations, yet do openly state racist views[/li][li]the people who would neither join w.s. organizations, nor openly state racist views–but who do believe that “the races” have differing characteristics and that the USA is fundamentally “white” (and that this status should be preserved)[/li][li]the people who wouldn’t feel comfortable stating that “the races” differ fundamentally, but who do feel an active unease when it’s mentioned that demographic trends are leading to minority status for white people[/li][/ul]
I would argue that it’s the last group that may account for those who voted for Obama, then voted for Trump. In neither of Obama’s races was his opponent a person who, like Trump, openly stated views that indicated that he valued keeping racial groups in their ‘proper place.’ I’m thinking of remarks such as
[ul][li]“they’re bringing drugs, they’re bringing crime, they’re rapists” [about Mexicans][/li][li]“thousands of Muslims were cheering” [the fall of the Twin Towers][/li][li]“there is great hatred towards Americans by large segments of the Muslim population”[/li][li]“I have a great relationship with the blacks. I’ve always had a great relationship with the blacks.”[/li][li]“He’s a Mexican. We’re building a wall between here and Mexico.” [to explain his claim that an Indiana-born judge would not be fair to Trump in his rulings][/ul][/li]
Trump signaled consistently that he was deeply concerned with race and that he felt there was a proper hierarchy, organized by race (and by gender, too), that should be upheld, supported, and preserved. In the 2008 and 2012 races, neither McCain nor Romney signaled such a thing as consistently. **This is why so many Trump supporters talked about Trump “telling it like it is” and “saying what the others won’t say.” **
So in 2008 and 2012, though some voters might have had at least a vague preference for a ‘traditional’ (white male Christian) candidate, they were open to giving Obama a try because the alternatives were failing to say what Trump later did say: that the status quo was changing in unacceptable ways by moving the straight white Christian male out of his proper place of dominance.
I believe Coates is quite correct in rejecting the standard ‘Trump won because of the economic anxieties of the poorer whites’ explanation, in favor of ‘Trump won because of race.’ I think he was being a bit disingenuous to use “white supremacy” as his term of choice, when “white privilege” fit his actual argument better.
But on the whole, the article deserves the wide attention it has garnered.
Trump quotes:
http://www.newsday.com/news/nation/donald-trump-speech-debates-and-campaign-quotes-1.11206532