I believe what he does should be illegal, since he's fulfilling the role of a mental health professional. Unfortunately the law will never support this any more than it will support the prosecution of a reflexologist that treats cancer patients. It's deplorable and should be punishable under law, but I just don't see the laws catching up with this, ever.
Legally, JoeyDonuts, I seem to recall only a licensed physician can diagnose and prescribe treatment for a medical condition.
It could be argued this 'pastor', by putting that arrant nonsense about deafness being caused by 'demons' on his webpage without a medical 'disclaimer' has crossed into the medical terrain.
It would be an interesting legal battle; however, realistically, I have to agree with Darth.
Put it behind you.
However, if you can't, maybe working with people caught in the meshes of this disgusting scam is an idea. Or blogging.
All the best to you, JoeyDonuts.