Just to be clear, I don't believe in aliens existence either...
I do believe that demons will disguise themselves as aliens... thus being able to terrorize and influence people without having to set them up for belief in God...
To me, it's just another example of the great delusion that will come upon mankind in the last days... All this supernatural activity... and everyone rejecting the supernatural explanation.
I don't believe that demons are building space ships ready to invade earth though. If they can get some to believe that they are... deception accomplished.
I don't think demons disguise themselves as aliens, they are aliens.
Angels or fallen angels are not just spiritual being, they can form physical body. The angels can eat, sleep, walk, can be physically touch human.
Let's look at the Bible, let's pick the story of destruction of Sodom and Gomorrah:
BTW, I think Sodom and gomorrah might've experienced nuclear blast that God sent.
Genisis 19
The two angels arrived at Sodom in the evening, and Lot was sitting in the gateway of the city. When he saw them, he got up to meet them and bowed down with his face to the ground.
2 “My lords,†he said, “please turn aside to your servant’s house. You can
wash your feet and
spend the night and then go on your way early in the morning.â€
“No,†they answered, “we will spend the night in the square.â€
3 But he insisted so strongly that they did go with him and entered his house. He
prepared a meal for them, baking bread without yeast, and they ate.
4 Before they had gone to bed, all the men from every part of the city of Sodom —both young and old—surrounded the house.
5 They called to Lot, “Where are the men who came to you tonight? Bring them out to us so that we can have sex with them.â€
6 Lot went outside to meet them and shut the door behind him
7 and said, “No, my friends. Don’t do this wicked thing.
8 Look, I have two daughters who have never slept with a man. Let me bring them out to you, and you can do what you like with them. But don’t do anything to these men, for they have come under the protection of my roof.â€
9 “Get out of our way,†they replied. “This fellow came here as a foreigner, and now he wants to play the judge! We’ll treat you worse than them.†They kept bringing pressure on Lot and moved forward to break down the door.
10 But the men inside reached out and
pulled Lot back into the house and shut the door.
11 Then they struck the men who were at the door of the house, young and old, with blindness so that they could not find the door.
12 The two men said to Lot, “Do you have anyone else here—sons-in-law, sons or daughters, or anyone else in the city who belongs to you? Get them out of here,
13 because we are going to destroy this place. The outcry to the Lord against its people is so great that he has sent us to destroy it.â€
14 So Lot went out and spoke to his sons-in-law, who were pledged to marry
[a] his daughters. He said, “Hurry and get out of this place, because the Lord is about to destroy the city! †But his sons-in-law thought he was joking.
15 With the coming of dawn, the angels urged Lot, saying, “Hurry! Take your wife and your two daughters who are here, or you will be swept away when the city is punished. â€
16 When he hesitated,
the men grasped his hand and the hands of his wife and of his two daughters and led them safely out of the city, for the Lord was merciful to them.
17 As soon as they had brought them out, one of them said, “Flee for your lives! Don’t look back, and don’t stop anywhere in the plain! Flee to the mountains or you will be swept away!â€
18 But Lot said to them, “No, my lords,
[b] please!
19 Your
[c] servant has found favor in your
[d] eyes, and you
[e] have shown great kindness to me in sparing my life. But I can’t flee to the mountains; this disaster will overtake me, and I’ll die.
20 Look, here is a town near enough to run to, and it is small. Let me flee to it—it is very small, isn’t it? Then my life will be spared.â€
21 He said to him, “Very well, I will grant this request too; I will not overthrow the town you speak of.
22 But flee there quickly, because I cannot do anything until you reach it.†(That is why the town was called Zoar.
[f] )
23 By the time Lot reached Zoar, the sun had risen over the land.
24 Then the Lord rained down burning sulfur on Sodom and Gomorrah —from the Lord out of the heavens.
25 Thus he overthrew those cities and the entire plain, destroying all those living in the cities—and also the vegetation in the land.
26 But Lot’s wife looked back, and she became a pillar of salt.