This endless expansion of sexual categories is a necessary consequence of what is now the fundamental tenet of modern sexual politics, and perhaps a key element of modern politics in general: That a person’s attitude to sex is the primary criterion for assessing their moral standing in the public square. If you say that sex has intrinsic moral significance, then you set it within a larger moral framework and set limits to the legitimate use of sex. In doing so, you declare certain sexual acts illegitimate, something which is now considered hate speech. This constant coining of new categories of sexual identity serves both to demonstrate this and to facilitate its policing.
There is a flag that needs to be set into the ground here: it should be possible for us as a society to have an honest debate about the morality of a sexual act without one side demonizing the other.
If we fail in that, we are not simply surrendering to political correctness. We are losing freedom of speech and freedom of religion all in one swoop, and thus losing what it means to be American.