You got a good enough idea: that humans embody the demonic ideas and essentially become the demon they act out while they act it out. I can agree with that but not in a literal sense, only figuratively/metaphorically.
Your inflexibility makes your illustration very fragile though. Insisting you mean literally in the dictionary sense will break your idea over from “ok, sure maybe” into “this fellow’s mind may not be fully functioning as it normally would”
I’m not here to call you names like conspiracy theorist, but you’re insisting in the same style as one, which is a major turn off.
That said, ideas live longer than man, that is easily seen. The fascism you’re talking about is just that, weird fascist leavings of some of the worst parts of our society that have been left alone to simmer for too long now. What do you think about that? It being political rather than it being demons?