It's religious discrimination. They're forcing their woke religion on everyone else. If you don't affirm their defacto religious claim of self-identity as being supreme over and above all other rights, they are religiously compelled to shun and excommunicate.
Their religion is fundamentally contra-traditional self-identification relative realism. It is downstream of feminism, the view that women and men are not fundamentally distinct. It's the result of the mindset that "you can be anything you want if you believe in it enough."