My cousin had schizophrenia.
You need to educate your father about the disease so he knows he’s hallucinating and may be able to exert some control.
Also. Meds help. They will not cure hum but would definitely help him live a relatively normal life.
There’s also a girl names Cecilia_Mcgough
She has schizophrenia and talks about it and spreads awareness and all. Check her out on insta/youtube.
I genuinely feel if people with schizophrenia can be made self aware there’s a better chance of them being able to handle it.