Of course it shouldn't be the only thing Democrats run on, but to me, whenever someone says "stop talking about identity politics and making everything about race!", I hear "talking about race makes me uncomfortable and I don't support slavery so it's not my problem!"
These are real issues, and Democrats should not abandon them for political expediency. Frankly, I'm tired of having to coddle white people who want to live in their "racism/sexism is dead" bubble (it's mostly white men who have never experienced it, and conclude that therefore it never happens), and get a little testy whenever anyone dares to suggest that some people have it bad because they're not white men, at least in part. If people would take an honest look at our immigration system (I'm helping my girlfriend deal with it right now, it's beyond horrible), our criminal "justice" system, the achievement gap in education, as well as who certain laws involving voting affect the most, it's not hard to see that we are not living in a post-racial society, and simply "not being racist" doesn't make all of these issues disappear.
This isn't to say that rural white voters in Pennsylvania are causing all of these problems, but if they aren't racist, they shouldn't be afraid of conversations about race taking place, especially given our history. I'll be very clear: If you attempt to derail any conversation about race/gender, or write it off as "PC culture" or "identity politics", you are part of the problem.
My oh my, you're quite the bigot aren't you?