KJK's thing is that she has one issue, which is woman = adult human female, and she'll talk to anyone on that basis.
Which means she'll sometimes go where others fear to tread. She's been on Carl Benjamin's podcast. I'm not sure I would do that (though I'd debate with him on neutral ground) because I have reservations about CB and many more reservations about the edgy boys he has on as co-hosts. But she went on, put her case in front of his audience, and neither of them said anything particularly outrageous.
If you listen to TRAs, they don't draw a distinction between KJK and the rest of us. They're quite happy to say that JKR, Julie Bindel, Helen Joyce, Maya, Allison Bailey, Alice Sullivan are all aligned with the far right. Of course you have to remember that these people are fucking insane.
But a lot of this started out with the lefty terfs using it against KJK, with the whole "pound shop Le Pen" thing. And they thought that if they were loud enough in denouncing an acceptable target, that the same line wouldn't be used against them.