This is great (by which I mean horrifying). The first tweets partake in some top-notch truth elision (by which I mean bullshitting). If you just read them in isolation, it sounds like the whole story of rape is false, that there was no MTF raping someone. But that isn't the case. They've just clung onto one aspect of her complaint which turns out to (possibly) be false, but to anyone not looking too closely, it sounds like they're confidently stating that there was no transrapist.
The truth is, JKR sperged out about a rape victim potentially being forced to address their (alleged lol) attacker using feminine pronouns. I'm sure we all realize that that would be bad if true, but it's not the big issue. The big issue is the actual event of the rape.
But that's not how it reads. If you know the context, these tweets can be read to say "LOL no, TERF. Transwomen might be out there raping women, but no one is forcing the victims to use the right pronouns! These notions of a trans menace are so ridiculous." But I guarantee most people just breeze over it and walk away thinking yup, JKR is telling more lies about fake trans rapists.