JK Rowling has a history of hate and outright bigotry that gets worse and worse. There is no defending her any longer.
This time she attacked a CIS woman for being intersex is a shameful display:
https://www.democraticunderground.com/?com=view_post&forum=1137&pid=62342
She has attacked and intentionally misgendered a journalist for being trans and even used racist attacks against trans people:
https://www.thepinknews.com/2024/03/05/jk-rowling-misgenders-india-willoughby-anti-trans-comments-online/
https://www.democraticunderground.com/113762087
Which itself was caused by her being a holocaust denialist when it comes to trans people:
https://www.democraticunderground.com/?com=view_post&forum=1137&pid=61797
She has compared trans activists to death eaters (villains from her books):
https://www.themarysue.com/jk-rowling-compares-trans-people-to-harry-potter-death-eaters/
She even attacks trans people who said nothing about her for simply being trans. The trans womans crime? Being the first official soccer manager who was out as a trans woman:
https://www.lgbtqnation.com/2024/05/cruel-jk-rowling-calls-trans-soccer-official-a-crossdressing-straight-man-for-no-reason/
Here she is cozying up to Matt Walsh to promote bigotry against trans women:
https://www.advocate.com/news/2022/7/11/jk-rowling-and-matt-walsh-blasted-online-over-shared-transphobia
Here are some resources that go into depth on the hurtful and trans antagonistic statements she has made:
https://www.vox.com/culture/23622610/jk-rowling-transphobic-statements-timeline-history-controversy
https://www.glamour.com/story/a-complete-breakdown-of-the-jk-rowling-transgender-comments-controversy
https://www.themarysue.com/jk-rowling-controversy-explained/
And here is a LONG (so feel free to skip if pressed for time) video deconstructing a pro-Rowling documentary defending her and explaining in painful detail all her bigotry against trans people to that date:
Ultimately I dont support book burning but that type of feeling is justified.