Can the mentally ill hold religious beliefs?

[Neoma]

7. I would say it's because the term mentally ill is very broad.

For one, it looks like you're essentially insinuating that all people with a mental illness are not in control of their illness. That all people with mental illnesses typically commits crime due to their illness, even though people who are mentally ill are more likely to be the victim of a crime. Also, most of the crimes aren't usually from the mental illness itself, but from drug abuse from self-medicating. You're also talking about the mentally ill as if they might not be individual people with their own religious beliefs.