Hmmm....one is likely, requires no physical evidence, and manifests itself in an organism that has been shown to suffer from mental disorders in a good percentage of its population. The other is incredible, should have physical evidence, and requires the presence of an unknown entity that has never been proven to exist. I think I will side with #1.

Before you state there are too many cases, you are wrong. How many cases? You stated millions earlier with nothing to back up that claim. I have heard Hopkins say thousands, with nothing to back up that claim. What is being discussed is a small percentage of the population that suffers from mental issues that manifest itself in this way. Considering that this is probably a percentage similar to that which seeks psychiatric help for various other issues, I don't think it is a stretch to suggest this is nothing out of the ordinary.