Hitler was the world's greatest demagogue ever, cuz he had a demon for awhile. After WW!, while he was still employed by the Wehrmacht as a spy on many of the little possibly-subversive parties then forming, he suddenly found he could "speak" & spellbind an audience. He'd never had that ability before. Soon after that, he met the "German Workers' Party" & the rest is history.
The demon was ordered outta him by God shortly after France fell, but he hung around & protected Hitler from assassination attempts. The3 demon evidently wanted to make him the "beast/antichrist", but the HOLY SPIRIT hadn't yet stepped aside to allow it.
The evidence is clear Hitler had some "outside help" to become what he did, as he was not that smart a person on his own. But one effect of that demon stayed with Hitler - his MEGALOMANIA.