I'm pretty much aligned with the gist of the editorial with one exception:
"The neo-Nazis and the KKK are a lunatic fringe who influence virtually no one."

DT has been overtly supportive of these groups.  In a way, he is spawning the upswing in Antifa, as they respond to real (or imaginary) threats.   My view is the belief in White Supremacy is on a dangerous upswing and is being stoked by DT.  Of course, no one will disclose their true opinions in a politically correct survey that you reference.