This attitude is silly. You can pout in the corner, and mumble "elections are hard," or you can work the problem. Considering social justice paired with a tepid pocketbook platform has gotten Dems where we are, it's time for a rework. You have to at least re-package an re-brand your economic relief. Lot's of the folks you write off don't prioritize health care, maybe because they're relatively healthy. Plenty don't care that you want a more robust safety net, may because they're prideful about assistance, they simply want to work good jobs.
Sure some are unreachable because of god and gays. But the folks written off as simply racist, may just look at the party that goes out of it's way on black issues, and says, "great, but I'm in poverty and the other guys says the plant is coming back."
The "Dems are stupid" reaction is partly correct. They have compromised who they are too much. The need for Third Way Dems has passed. It's time for progressive economic ideas to come to the fore, and pair that with a muted messaging on social issues. Support the latter, but emphasize raising up ALL of the lower and middle class over issues that, in reality, the march of time will take care of.