Schizo being from entities...? I doubt it. I think mostly parasites. I've seen mother too struggling with insanity at end of life. I got her hospitalized three times and she hated me for that, she died without forgiving me. Of course, now I understand better all that was involved then that I couldn't figure out no matter how I tried.
But I do believe that entities can enter your mind after a trauma. Last night on TV, there was this kid (8-9 years old) who happens to see his father committing bestiality in the barn where he lived with his parents. The man got so angry at his son that he chased him and got him to the barn and had him perpetrate same act as he previously did. The poor kid was thereafter split in his mind and no matter the many exorcisms he went through, he had a very miserable life and died by violence (suicide). Kind of heavy stuff to start a day. I think I might go out for a walk.