In my experience, lots of psychiatrists, psychologists and GP's believe that. They just can't say it. As soon as you say it to them, or talk about how other cultures handle these issues, they tend to be a lot more frank with my beliefs.

I used to do residential disability support (before I wasn't allowed to because I'm so dangerous). A lot of the African support workers refused to sleep in a house with certain particularly disabled (and deranged) individuals. Said it was risky to fall asleep around so many evil spirits. I'm not African, but I've had some nasty paranormal experiences in those houses, but more with the teenagers removed from their parents than the disabled people.