Of course I agree with this concern, and I agree with a lot of what you've said here, but I don't think these people are nearly as numerous as they're made out to be.
There may always be religious extremists and racists in the world, but when it comes to the seventy million people who almost voted Trump back into power, I think it's way off the mark to suggest that they all fall into one or the other category.
As for the people who lacked the foresight to adapt or were too lazy, I think that's too harsh. Many towns have been absolutely decimated.
And of course, many of the people who worked these manual jobs lack the education to perform more technical jobs, or even to study for anything that would pay a decent wage. It mustn't be forgotten that anbody who spneds gtheir free time on a website like this is way above the national average in intelligence.
It's a really difficult problem. I'm certainly not claiming to have all the answers or that they're simple. But I do believe that dismissing these people as lazy or stupid plays into Trump's (or those like him's) hands.