What do people think to the idea that aliens/ufos are demons? [Spirituality & Religion]

I think the problem lies in mankind not completely knowing how we came to be on this planet. If by evolution in being something random or accidental as some believe, then we are totally unique and what chances are there of this happening elsewhere in the universe? Creation is another theory, but either way, if we are alone how sad the universe is but even more sadder is how we are treating our beautiful earth an each other. Perhaps we deserve to be alone after all.