You assertd that aliens are demons. To what aliens are you referring? I know of no evidence that any "aliens"exist at all. That places them solidly in the realm of superstition IMO. That's also where I stash the belief that Christians should be forbidden to worship Christ on certain days because those days belong to dead pagans and their imaginary gods.
Fr. Seraphim Rose was of the opinion that the “alien abductions” reported by people were of a demonic nature, which corresponds with the idea that the existence of aliens, at least aliens and UFOs active on our planet, are superstition, based on Psalm 95:5 LXX, “The gods of the gentiles are demons.” This verse in MT derived psalters like the Coverdale and KJV is “The gods of the gentiles are idols.” Both readings are correct, I think, so one could say that “The gods of the gentiles are idols of demons”, and idolatry is inherently supersitious.
And if you have ever unwittingly encountered (no pun intended) a UFO convention, which was going on at a hotel where I stayed in 1998 or 1999, it is obviously a religion. In some cases perhaps a secondary religion, in the same way someone can profess Christianity while also participating in fraternities of a religious nature, but a religion nonetheless, but not piety, to use the ancient Roman definition of the term, in a manner of speaking, but rather what they called Superstitio.* I recall sitting down in the coffee shop for a meal, and some UFO conference attendees were at the next booth, and a young woman, in her twenties, among them, informed the other members of her party “I’m guided”, as in, prompted to do things by an alien consicience.
If she was honest, such promptings would of course be of a diabolical nature, as superstitions tend to be (I regard even reading the horoscope as something Christians should avoid, because it can distort our mental models and cause us to impute upon the people we meet personality characteristics, attributes and inclinations which are in fact absent or illusory. I myself once experienced spiritual delusion, or prelest as it is known in Eastern Orthodoxy, in this way.
*The Romans regarded the mainstream pagan religions as pious, and Christianity and later Judaism as superstitious, but as the Roman Empire under Emperor Constantine later became the fourth government to legalize Christianity, after those of Kerala, Edessa, and Armenia, (and possibly the Sassanians) and the fifth government to make it the state religion under Emperor Theodosius, after Edessa, Armenia, Ethiopia and Georgia (well, Kartvelli, the largest Georgian tribe), not counting Gothic tribes converted to Arianism, which I regard as non Christian and which later conquered Christian lands and severely persecuted them, I define authentic Nicene Christianity as pious, and heretical Christianity and all other religions as superstitious in fact, although I will speak of the piety of, for example, practitioners of Judaism or Sikhism or other religions that share values with Christianity.