Ok. I'm gonna try break down your brick wall.
The article writer, all those commenters I quoted, the other article writer on JP I posted just above that, and myself...in summary we all don't like the truth you've identified (which is that the Right's version of identity-politics is the problem). Instead we blame the Left's identity-politics. But that version is virtuous as it has policies of inclusion and acceptance.
So why are we fighting against what you clearly believe are policies of inclusion and acceptance?
That has to be your intellectual curiousity: why are we fighting this thing which in your mind is virtuous?
Honestly I have no idea why the right choose to demonize minority/marginalized groups other than it's easier to win votes and stir outrage by doing so.
Divide and conquer. It's not like this is a new thing. The right in this country have been stoking fears about anyone who is slightly different than them forever. Rush Limbaugh has made a long and lucrative career out of it.