Didn't read the article but I will say the obsession with the alt right/Nazis has led some to overlook the fact that conservatives don't have to be alt right in order to be assholes driven by resentment and racial/sexual/etc bias. Ben Shapiro isn't alt right and has largely stood against Bannon since leaving the site, nor is he a Trump guy last I checked...but he's a typical far right conservative on many issues. No he's not a Nazi but he believes white supremacy is largely a myth, Obama was basically a racist, gay/trans people are largely deviant behaviorists demanding rights that don't apply to them etc.
So Trump isn't far off from where many of these people land on the political spectrum. In fact you could say they're well within the same ballpark. Hence republican views on immigration, black shit, gay shit, etc largely mirroring Trump. A lot of these people held all types of ugly beliefs and if anything, 8 years of Obama drove them off a fucking cliff.
This is also why I disliked the attempt by democrats to seperate Trump from the GOP. This IS your father's Republican Party, socially at least.