Well, she had already been stirring up nonsense on a smaller level for quite a while.
Rumors are that after that transgender stuff, Favreau went to bat for her with Disney and that's when the story about Pedro Pascal (who has a trans sister) talking with her to try and explain why what she'd done was hurtful to some came out. They apparently tried to give her a "Hey, you're catching heat for this and it would be great if you stopped" talk.
And then she responded by becoming so much more explosively toxic that it boggles the mind. Hollywood Reporter straight up said she was supposed to have a show announced (or star in one of the announced shows. I'm still thinking Rangers of the New Republic was going to be a Cara Dune vehicle originally) at the investor's thing in December, but that Disney pulled the plug after it was obvious she was a lost cause.
In other words, she was apparently given at least a couple of chances/warnings and responded by publicly equating herself to a Jew during the Holocaust.