He knows exactly what has people upset, worried, and angry. He also tells those who support him that he loves them and he means it! WHEN WAS THE LAST TIME ANY POL TOLD AN AUDIENCE THAT HE LOVED THEM ? Even Slick Willie didn't do that!
The damned elites keep talking about "the uneducated" and worse, who support Trump, completely missing the fact that Trump is supported by all socio-economic classes and all of the educated or not spectrum.
Trump is definitely not writing off anyone and I think he’ll at least get decent numbers from those groups, because he will make direct appeals to them.
As for how he treats his supporters. I agree with you 100%, and if you want an example of a POLAR OPPOSITE - of a person that knows how to knock the wind out of his supporters, here it is:
https://www.youtube.com/watch?v=TAcVEFkIIXY