We have pretty different views on what's innocuous, but with people like Rowling it's always a pattern more than any one statement. For instance she'll post a link to a pin with a simple feminist message on it, completely innocent, but she'll be so unlucky that this shop also coincidentally sells some of the most vile anti-trans shit you'll ever see. Unlucky.
She's now praising anti-woman Christian conservatives like Matt Walsh because of their shared opinions on trans people (though she'll not go so far as calling him an ally, in contrast to some of her friends). She's saying that the whole bathroom thing is providing "cover for predators", yet it has never happened. When three people post a picture of themselves outside of her home with protest signs she has no qualms about connecting that to a wider point about how not only the "trans movement" but trans people supposedly behaves (even though none of them were trans), yet she has no problem with gender critical people who has done way more explicit doxxing of people who aren't famous with not very hard to find houses. When her overtly anti-trans real life friends are asked to leave a Pride parade she'll frame it as "lesbians no longer welcome at pride" when it's just an obvious lie that it had anything to do with them being lesbians, but because their open and basically only active goal as a group is to oppose so-called "transgenderism". She'll say that the medical threatment trans people get is a form of conversion theraphy (something that coincidentally matches perfectly with the common gender critical views that trans women are men and that trans men are lesbians under attack, and is probably ironic given her pen name), and she'll booze around with groups like LGB Alliance, people like Maya Forstater and so many more. She'll say that the "gender identity movement" is nakedly misogynistic and a threat to women. And in Linehan style, so so so much more.
Trans women are men, trans women are a physical threat to women and a threat to women's rights, women are under attack and the LGB Alliance is great. That's what Rowling believes, innocuously or not.