With identity politics, the important thing is to put someone in a little box.
Once that's done, people are conveniently reduced to labels. Then, name
calling can replace thoughtful discussion of issues. If Trump is a "racist",
then everything he does, everyone who supports him, everyone who voted
for him becomes "racist". And all things become proof of their racism.
But because Democrats are "progressive" & "liberal" they're incapable of
racism. Try to accuse them of it, & out come the cries of "False equivalency!".
So it's the demonization of the other side, & the sanitization of one's own.
It's why we see so much about what's wrong with Trump, but much less
about what's wrong with his policies.