Regarding "the driving out of demons"...that was a concept in ancient times which, if translated into present terms, would amount to "clearing out deeply negative thoughts and emotional patterns".

For instance, suppose someone is experiencing paranoid delusions of some kind and he kills some innocent people who are really no threat to him at all and he mutilates their bodies...that sort of thing happens in our world, doesn't it?

Okay, in ancient times it would have been assumed that he was possessed by demons. In our time it would have been assumed that he was mentally ill and possessed by negative thoughts that he couldn't control.

What's the difference if you call it "demons" or you call it "mental illness"? It amounts to the same thing in its effect on the person. The only way you can cure such a person is to remove the negative thought forms that are controlling his actions...and that's usually not easy, is it?

Why make a big deal over people in an ancient time once having called negative thought forms "demons"? They were just putting it in terms that made sense to them in their own time. I expert they would think some of the terms you use now are bloody stupid too if they ever got to hear about them.