I don't understand it with the already famous, which she was.
I do, sadly, sometimes understand it with the sad and lonely. They inadvertently (or intentionally) step on some hot button landmine, and the subsequent attention they get — affirmation, criticism AND then support from people who attack their critics to defend them... they find addicting. So they lean into it.
She just seems to be suffering some sort of break down.
Yes, these are clearly her long-held and secret positions. But why she is just turning her life's focus into hatred... makes little sense. I sincerely hope she gets help at some point.