Race

The Latinx problem. 

Yglesias isn’t claiming that the use of this word is causing people to vote Trump. He calls it a “symptom” of a broader problem with how the intersectional left addresses racial issues. As he puts it, there’s a “tendency to privilege academic concepts and linguistic innovations in addressing social justice concerns.”  

And 

To put it simply, woke white progressives are more racially sensitive than a lot of minorities.

Because the only minorities white progressives hang with are an angry, misrepresentative, academic sort. What could solve the issue is a little more actual, on the ground interaction and co-problem solving (like playing sports, being neighbors, or working together), but I don't see that happening on a large enough scale to matter.