How you feel about their vote and how you feel about the material circumstances of their life are two distinct things. It's quite possible they've got a legitimate grievance, and nonetheless voted poorly.
I say this as a member of the liberal elite in urban Canada. Things are great right now for my set!
I've been to Pittsburgh and rural Vermont within the past year, as well as NYC. In Pittsburgh I happened to be in a hospital waiting room and saw some of the poorest looking white people I've ever seen. Missing teeth, ragged clothing, leathered skin, sunken eyes. It was shocking.
In Vermont, I heard many stories of the opioid crisis. It sounded quite severe.
I've also driven through rural Maine with my family. Rusting cars and junk heaps in every backyard, doors falling off the hinges, chickens running amok.
Certainly they're not the only group to have struggles. But to dismiss their troubles is part of what got us here.
Here are some stats on the recent mortality shift: http://www.pnas.org/content/112/49/15078.full