Identity politics is gleefully adopted by the elite institutions, and the base of resistance against it is working class.
To use a concrete example, consider MacKenzie Bezos donating tens of millions of dollars to “AAPI” organizations. Those AAPI organizations don’t answer to recent Chinese or Bangladeshi immigrants in Queens. Their whole incentive structure is oriented around appealing to rich white people like MacKenzie Bezos. Or to use another example, consider BLM. Civil rights issues historically were championed by black churches, who answered to black constituencies. But organizations like BLM are funded mainly by white people. Ibram Kendi is a professor selected by white faculty at a university run by white people.
The fact that those white elites will often support advocacy complaining about “white people” doesn’t change that. When a white Harvard professor complains about “white people” they don’t mean themselves. They mean some racist truck driver in Iowa. They’re in denial of the fact that they’re actually the elites.
I'm not saying you're wrong, but I'm completely baffled by how you've managed to reach the opposite conclusion to the one I'd expect.