I didn't disagree with you, ever, that a party ran on civil rights and so on alone, cannot win. Nor do I disagree that this is not incredibly painful. I do understand at least a little - some of my family were refugees from Konigsberg when the Russians came and forced population exodus, some were Catholics in Northern Ireland who had to flee being shot due to sectarian strife, and I have some Arab descent, though not enough to appear anything but white. I can't pretend that I share anywhere near the same situation, but I do have at least some small inkling. I didn't grow up in a wealthy household - I was raised by a single parent who worked as a tourist guide for the local council. So I know a little of what that indignity involves.
But what I'm saying is that: despite this, things aren't over. A civil rights party alone can't win. But there is a huge mass of Americans who, frankly, don't care either way about civil rights. It just doesn't factor into their voting decision at all. They can vote for Obama as easily as they can for Trump. And that means a civil rights party can win... if it is a ____ and civil rights party, if it can build a coalition with people who don't care about civil rights but need another bloc to work with to achieve their goals. That's not great. But it is better than nothing.
And I think shutting off all the people who don't care either way about civil rights - won't vote for it, won't vote against it - as white nationalists is just giving away any chance of ever protecting minorities again.