OK. Lemme make some points:
1) If her Instagram (and this video) are anything to go by, that chick does not seem 100% sane.
BUT
2) Have you seen some of the commentaries on her instagram? They were literally death and rape threats. She didn't harm anyone - no one, specially if that girl does actually have a mental illness, deserves experiencing that.
3) No. You can't be racist against white people, as they do not face any kind of real oppression for the sake of being white. Non-white people are victims of racism - racism as a system of oppresion (not only in the USA, but also in the rest of the World)
4) Yes, some """"SJWs""""
are extra. But you can't disminish an entire movement (third-wave feminism) because of a minority who does that kind of things. Because, yes, the """"tumblrinas"""" is a minority in the system of feminism.
Hope that helps.