It's also not just fear, it's anger. I've written about this before. Anger about globalization that has passed them by. Anger at having their religious beliefs not only disagreed with, but then called wrong, and then called immoral. Anger at the young tech-rich who they know all about thanks to social media that they never got a part of. Anger at wealth disparity. Anger at the fact that sometimes scofflaws are treated better policy-wise than they are.
Here's my thing -- it's easy to call them stupid, or evil. And I've already said -- I see support for Trump as an intellectual and/or moral failure. But I am trying to be empathetic as to WHY they haven't been able to use their intellects to see through this man, or their moral center to see past this man.
Because if they are a simple irredeemable sub-species, and we call and treat them as such, we can NEVER reunify the nation behind any President. Or at least it will take far, far longer with even more division and acrimony than we have now, if that's possible.
My fear is that acceptance of Trump's behavior by the "ambivalents" -- the most craven of ALL in this melodrama -- impacts the nation precedent-wise the same way Washington refusing to be called king or stay for a third term did (til FDR) -- only in the opposite fashion. We have to reject the MAN, not the people who voted for him when they are citizens like us, when they are fearful and angry. Some of that fear and anger can be addressed, which is where some of the radicals here (Sanders supporters) have a point or two once in awhile.
I will say again what I think galvanized Trump supporters more than anything else was Clinton calling them "deplorables" (or having been perceived as having done so). That's what we as rational people regardless of where we come down on the political spectrum can't afford to do again.