Why am I telling you all these facts?
Because popular media affects reality, it can have measurable influence on public feelings and perception, and in some ways can affect you on a deeper and more visceral level than any straight-forward lesson can.
So if you don’t think that the movie Split can cause serious stigma and harm towards people with psychotic mental illnesses – though particularly Schizophrenia and DID – through turning public perception against them, and portraying them as dangerous monsters, then you haven’t been paying attention.
Don’t give your money to this dangerous, misinformed garbage.