Agree with you both. Demons will hitch a ride with the best they can get- they have a hierarchy, too. A big dog demon won’t waste his time inhabiting a simpleton when he can ride someone who is “going somewhere” IMHO. Simpler, lesser spirits or fallen angels might be satisfied to inhabit my neighbor’s dog or a crackhead. (Not to disparage the worth of the crack addict as a soul to God, but as a vehicle for the devils to do damage).
These are interesting questions from several aspects. Is history, or some parts of it, inevitable?
What would have happened it it had been Trotsky, not Stalin, Beria, not Khrushchev, Guevara, not Castro, and so on?
Would the USSR still stand if it had been Carter in 1980?
If only he hadn’t been abused. That is all I have to say. I think Hitler was destined for greatness and during his sojourn in Austria, the ‘missing years,’ he probably faced a tremendous amount of spiritual warfare and he lost out to the demon he let enter him. All the greatest names of the world have faced serious spiritual warfare and starting with Christ, all those ‘destined’ for greatness have had year in which they wandered and were ‘off the grid.’