Split

Mary • My beliefs and opinions are constantly evolving
So I believed a movie came out, and it's called Split. If you've seen the trialer, then you know what it's about.
People are arguing saying how people shouldn't watch it bc it demonizes people who have DID (Dissociative Identity Disorder). It's where they have split personalities. I can't say much bc I haven't watched the movie yet, but from the trailer I think it's pretty interesting.
What do you guys think? Is the movie Split insulting to those who have DID?