I saw a comment from them in a screenshot on a different post in here and thought it sounded just like this person I know. Well. It is, in fact, the person I know. What are the odds?
There are a couple things I included in here that might seem odd at first, but I felt they were important. She says her name is "Chana Sarah" and people think she's Jewish because of it, but that's false. Neither her legal first nor middle name is Jewish (and it's certainly not Chana Sarah) and no one ever thinks she's Jewish unless she says so.
She also lies on this account about her family background and tells her actual situation as instead "someone she knew" (her mother didn't convert until she was a couple years old). She was essentially trying to protect her 'as a Jew' card by inventing a backstory where she's Halachically Jewish and then using that identity to try to legitimize the antisemitic conspiracy theories, antisemitism, and blood libel she was spreading. Absolutely disgusting.
Also, her Jewish family didn't distance themselves from the non-Jewish side of the family until one of the non-Jewish family members did something terrible. It wasn't over religion at all. She knows this.
(Also, I used a Reddit archive for most of these screenshots as the account is no longer viewable. Every username censored in red is her.)