Toni D'Orsay translation guide
For anyone who's confused.
Forced sterilisation:Toni seems to have interpreted Brennan and Hungerford's letter to the UN as saying that they recommended that only trans women who had undergone "bottom surgery" be allowed access to sex-segregated spaces for women. Such surgery involves removing the penis, and hence sterilisation. Toni believes that preventing people with penises from accessing women's bathrooms is "forcing" them to undergo sterilisation.
Moral genocide of trans people: If gender is abolished, then by extension transgender ideology will no longer exist. Therefore, people who might have been transgender under a genderist regime will not be transgender, because that will no longer be a meaningful category. In a sense, it would be accurate to say that, "transgender people will not exist." Toni calls this "genocide". It's kind of like how eliminating smallpox is a "genocide" against people with smallpox.
erratum: the original version of this post attributed the view that only trans women who have undergone sex reassignment surgery ought to be allowed into sex-segregated women's spaces to Brennan and Hungerford themselves. see here for details and Brennan's actual views on "gender identity".