You have a genuine compassion for others that's both reassuring and refreshing.
:think: While we are often what we say, I've seen, when push comes to shove, some of these same reach out in incredible compassion, lest we fulfill and us/them mentality. Such carries its own negligence and harm.
I'd be interested in what you'd say to those who would reference a literal, historical interpretation of scriptural accounts of possession.
I've met people who claim it. Most of what I've seen in mental capacity is chemical imbalance. My uncle, a beautiful person who horribly abused his body and mind with drugs, might have been diagnosed with demonic influence and I think spiritually, there are consequences to our choices. Perhaps that is why 'this comes not out without prayer and fasting' Mark 9:29 And perhaps His application to us, is to pray a lot and strive as any kind of medical, psychological, and spiritual help must surely endure. At the end of much prayer, fasting, and trying to help my uncle, he one day asked for a Bible and asked me to pray for him. His mind was not whole, but I believe God heard his prayer. Luke 23:42 For me, the remedy for all is our universal need for our Savior. Mark 2:17