I don't have to believe in their "best intentions" to know what it means to win and lose at politics.

And the way you win at politics is by pacifying the powerful. Not 'voters'. Hence the Princeton study showing the ordinary voters' preferences count for literal zilch.

All this shit about how to make the Right "pure" is a luxury that we can only indulge in after we become the dominant power, and doing it now only keeps us weak and out of power.

I disagree, you need unity when you are in power because then you are pushing your agenda.