He borrowed Trump’s argument of the elections being rigged against him in the primaries last time. And he seems to be borrowing the concept of being against identity politics (under the right wing definition) this time. The second I heard about that, he lost me for good. He became my “hold your nose and vote” candidate if he were to win the nomination.
Sorry, but you don’t deal with your problem reaching out to non-white voters by declaring the other people not to matter. And that is what the attack on “identity politics” is. It decries the idea of black people having concerns that cause them to vote together. It decries the idea of gay people having concerns that cause them to vote together. And it ironically only really appeals to one identity group: the cishet white male, for whom identity isn’t actually important.
“Identity politics” actually means “people with commonalities in social groups will tend to have the same issues, and thus come together as a political block.” It’s normal. They have issues, and they’ll vote on those issues, which will generally mean voting for the same candidate.
The only real contradiction is intersectionalism, which points out that people actually have multiple identities, and how they intersect will influence their issues, and thus how they vote. You can’t assume the whole will be the sum of the parts.
The only meaning I can come up with for the derogatory “identity politics” is simply that “those stupid nonwhite people don’t vote right!” With Bernie supporting that, he’s not really a progressive at all.