Making lists of people with a protected charateristics who have committed crimes
JKR didn't make a list of trans criminals. There were some criminals on that list, but there were also athletes and a former newsreader. What JKR did do was make a list of people who are insisting on entering women's prisons, sports teams, and swimming ponds whilst male.
the statistics they've cobbled together are correct
By "cobbled together", you mean the ones collected for decades by the Office for National Statistics?
If JKR was using this approach for black people, or gay people, all of you (I hope) would be up in arms against it.
Black women commit no more sexual and violent offences than white women. Likewise lesbians compared to straight women.
Black men commit no more sexual and violent offences than white men. IIRC they commit slightly fewer than white men. Gay men commit no more sexual and violent offences compared to straight men.
Whereas males make up slightly under half of the population yet commit over 95% of sexual offending. And we know that gender reassignment does not alter that.
Facts don't care about your feelings. Facts don't care about your dishonest attempts to compare apples with basketballs.
But no, this is your pet hate group, so you support it.
It's not "hate" to want males to stay out of female spaces and sports. It's merely having boundaries. When women having boundaries is framed as "hate", you know that you are dealing with a misogynist male entitlement movement.