There's no such thing as demons. It's just mental illness. ..and some weak people are just looking for someone to blame.
Part of the biggest probable difficulty for most people is seeing , let alone accepting , that we are not talking about a single Alien race .
Rather , several . And it is academic at this point , imho , to argue what the total number might be
However , because of the likely super enormous source distances between the several races , it then seems likely that
various technologies ought or will make up the parts of a much bigger total picture .
So , for example , some craft seem to produce radiation type consequences if you come to close to them , others can move you ( teleport) without harm and likely as evidenced in abduction instances . And even others appear to produce no ill effects to us, whatsoever , but do affect machines and appliances and often time itself .Time loss .
From all of this, it is not unreasonable to then label any one group who are harmful in various ways to us as a species , as Demons . But this is just a label .
And now any proposed link between Demons designated as products of a God of the Universe falls apart( we can name the God as Satan or the Devil for convenience ) . But these Demons would be just a race which , for whatever reasons , are not our natural allies and even more likely , are part or total enemy .
In the same sort of way , other so called good aliens can be labelled Angels . But that does not mean they are products of the God of the Universe . Rather , just a group which bears us no apparent ill will and could actually turn out to be friendly and intending no harm – the Tall Whites by reputation might be one such example .
My one huge difficulty is in understanding how it is possible that so many of these alien craft crash , whether from their own problems , or , whether from us as a species bringing them down .
You might reasonably think that Craft that have travelled such huge distances ought to be incapable of falling victim to our very young technology because these other races should be hundreds , if not thousands , or ,even millions of years older and more advanced than ours .