Which came first, the effect or the cause?

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Leiter:

Religious toleration and identity politics
Philosopher Paul Russell (British Columbia/Gothenburg) comments, arguing, rightly I think, that religion is more like politics than race.

Leiter agrees, or thinks he does, that religious belief is more like political belief than it's like variations in human morphology.

Russell:

The limits of tolerance: A religious worldview cannot expect the same kinds of tolerance as racial, gender, or sexual identities. Here’s why 

...Race, gender and, more recently, sexual orientation are forms of identity that have been especially prominent in politics during the past century. What is striking about these forms of identity is not only that they are generally unchosen, but that they are not based on any ideological or value-laden set of commitments of a political or ethical nature. Of course, the significance and interpretation of non-ideological identities, the ways in which they can be viewed as threatened or disrespected, is itself an ideological matter; but the identities themselves are not constituted by any ideological content (systems of belief, value, practices, etc), and the groups concerned could vary greatly in the particular ideologies that they endorse or reject. 

For this reason, there is no basis for criticising a group (or individual member of it) on the basis of race, gender or sexual orientation. It would, for example, be absurd to praise or blame Martin Luther King Jr for being black, or Margaret Thatcher for being a woman. There is no ideological content to their identity to assess or debate – the relevant identity is an inappropriate target for praise or blame, since there are no relevant assessable beliefs, values, practices or institutions to serve as the grounds of such responses. The identity of the group turns on natural qualities and features that cannot be discarded in light of critical scrutiny or reflection of any kind.

"What is striking about these forms of identity is not only that they are generally unchosen, but that they are not based on any ideological or value-laden set of commitments of a political or ethical nature."

If you're punished for a form of identity that's unchosen or that you perceive as unchosen, the first reaction, when and if you have the strength to respond, is to take that label as a badge. And "gender identity" is no more or less a choice than the choice, or the need, to believe in a god. To have a cock and say "I am a woman" is a statement of belief not biology.
Philosophy professors and politicians are fans of their own authority. If you take
ideologies as ahistorical, examining them to see whether they're "true according to their own criteria", [etc]  you really miss the fucking point.

Societies, even slave owning societies, do not exist to oppress but by way of oppressing, at the same time existing as cultures that their citizens, as opposed to their victims, enjoy. When critical culture sees society simplistically as a series of absolute forces it recreates those forces (fighting an imaginary fire with fire) in an esthetic of totalization and universalization that becomes a parody of the past, as Fascism in its attack on bourgeois values is bourgeois parody of Monarchism; as the art of the Salon is precursor to the art of the Third Reich and to Stalin's Socialist Realism. All cultural groups exclude others, but by assuming that they exist for that purpose, as Fascism and Communism assumed. or as many on the “critical” [read: academic] left still do the issues are willfully occluded. Our "project" should be to understand this process, and to overcome the irrational fear of otherness, not to desire an absolute, unified, reified innately narcissistic 'one'.

The answer to the confused identity politics of the Right is not an identity politics of the Left.