@Angle I think it's important to note that, because Mr. Simler presupposes a purely material world, the theory of gods and demons he presents dismisses completely the more uncanny experiences of the supernatural.
You might be interested by this, for instance:
https://www.theamericanconservative.com/dreher/devils-of-manhattan/
One should be sceptical about all such accounts of course, but those who are involved would say it's more than just hearing voices.