I may have an answer to how to reach these people.
The main enemy of the non-college educated upper middle class is the actual upper class; people like Trump. We need to concentrate on that, and insist on that. Remind them, over and over, that Trump consistently stiffed his contractors.
At the same time, we need to offer an out; we need to say, “You can be respected and adored; you just can't be kings” to this group, so that they have a place to go.