Someone was convinced her sleep paralysis was demonic possession. Others supported her delusion. Helpful?

Yesterday, a person described a clic case of sleep paralysis where the mind half-wakes during REM's body-paralysis stage, becomes scared of the paralysis, and projects the fear as a real form based on one's belief system. This is a well-known phenomenon and is treatable. Yet others were supporting her belief in demon possession, saying that she should do these religious rituals. Is it helpful to her to support her delusion? I'm really interested in whether this is harmful or helpful...