I’m a fightin’ fundie, and yet I pretty much agree with this analysis from a Roman Catholic source. It’s beyond the bound of any normal human wickedness. There did not seem to be any score to settle, wickedly or otherwise, for this shooter. This looked a lot like wickedness for the sake of the thrill of the wickedness.
Think of all the very-understandable. natural (physical, intellectual and social) motives for evil: desire for pleasure, comfort, ease, wealth, a feeling of well-being, maintining a good reputation, or the suppression of pain, revenge on somebody who has wronged you, wild release of anger or lust, etc.
All natural and in a way understandable, though evil.
Now think of some crime in which none of these natural drives are really at the root of it. My friend says that when the evil act makes no sense in terms of natural saisfaction, that's when you know you're dealing with the demonic.
His example was that at some famed Nazi concentration camp, Allied troops were known to be within hours of coming in and occupying the place, and in those hours the camp staff (men and including women) were going around murdering as many of the remaining prisoners as they could.
It defied "rationality." It could profit them in no way. If they were "rationally" evil, they would have gotten out of there themselves, to avoid being seized by the Allied troops, or at least tidily disposing of the evidence of their own crime. But they were determined to do as much evil as they could in the hours they still had left, even though it was directly and immediately incriminatng to themselves.
Evil with no humanly explicable reason. That's -- he says --- the sign of the presence of the hellish entities.
There did not seem to be any score to settle, wickedly or otherwise, for this shooter.
That is why, even for those who are in Christian based deliverance prayer ministries, if it is a case of true demonic possesion, they would call out the “big guns” and bring in a Roman Catholic priest who is trained to do exorcism.