Here's the thing, Blackbird. Even if women were issuing death threats to trans people (which they're not), it's not really salient to the argument.
Let's remind ourselves of the argument that trans activists make repeatedly: trans women pose no threat to women. They are mild and sensitive people who just want to "pee in peace".
Every time a transactivist makes a threat to Rowling or any other woman, they undermine that claim.
And they have made thousands of threats. As Rowling says, she could paper her house with them.
So you could argue that transactivists are engaged in an extreme kind of gaslighting, by deliberately contradicting their own statements.
Or you could just argue that they are very, very thick.