Great essay by Briahna Joy Gray:

Identity is, at best, a loose proxy for a person’s political commitments, and individual identity groups contain incredibly diverse perspectives. Failure to recognize that fact can result in dangerous consequences: it can lead us to support policies contrary to the best interests of a community simply because of optics, and it can turn us into a “firewall” to lean on, rather than a constituency to be won.

Even worse, because the optics are improved, it can actually become harder to combat the harm posed by in-group bad actors: a black-run police force can be just as harmful to a black community as one headed by whites, but the optics of equal representation can obscure the reality of systemic racism.

https://www.currentaffairs.org/2017/08/how-identity-became-a-weapon-against-the-left