>>40686885
>Our modern conception of the demonic has been warped by centuries upon centuries of cultural shift and media reimagining.

That contradicts or dissolves your following point.

>If demons exist then they don't want you to know their demons; a demon would never reveal itself as demonic.

At the very best we can make "educated" guesses as to their functions or habits based on lore and hearsay.

At the worst, it's straight up racism to a sister -noid species.

Then there's the whole frieren take. Mimicry vs Sapience dilemma, but again we're working off of millenia of hearsay.