No doxxing was necessary, Tillie did it all publically, publishing on a home server, making announcements on Telegram under their real name. I don't quite get it either, but they specifically didn't want to hide in (pseudo)anonymity.
Can Confirm. I was big into telegram communities at that time and joined when her group was public. I have nothing to prove because I delete all my stuff but the indictment shows screenshots and transcripts from the group. She literally posted selfies on Twitter sometimes.
I don't agree with most of her more radical views and find her methods to be too extreme, but she clearly stood behind them and didn't hide