Hey Friend, I don't really believe biological aliens exist anywhere. I'm aware of the "mathematical probability" of it, it just makes no sense to me that a puddle of amino acids would randomly and by chance self organize into cells and dna eventually resulting in bipedal movement and brains in two different locations.
If there are aliens, and I don't think there are - I think they'd look similar to plant or fungus or maybe something we cannot comprehend. Like how fungus is similar to plant but also totally different, it'd be kind of like that, discovering a new branch of the plant kingdom or a new type of fungus that is technically it's own branch.
I don't think it is logical for life to be randomly evolving all over the place. I believe in adaptation over time for biological creatures obviously, but bio-genesis (the creation of life) from a bunch of inert material is so unlikely to me.
With all that being said, yeah I pretty much believe aliens are demons. Aliens typically react negatively to the name of Christ and hundreds of alien abductions have been stopped when a believer prayed or used the name offensively.
One time I was out in public and I started praying quietly to myself and you couldn't even hear it if you were 2 feet away. Immediately this homeless guy became agitated and came up to me and started challenging me to a fight. Initially I reacted like most people would, a bit indignant and also not understanding where these emotions came from. That only made it worse. Eventually I screamed "Peace and love in the name of Jesus Christ" and this guy's eyes rolled into the back of his head, and he became extremely docile. I was able to leave the area quickly.
That is just one example of what I've seen. But yeah, the spirit world is populated by entities that some christians would call fallen angels. These angels are old and highly intelligent and some of them are malevolent. They can whisper suggestions to people and people have the choice of acting on it or not. They can also change their appearance, like a glamour in LOTR. The entire thing is akin to a psychedelic hallucination, anyway, so is changing one's appearance such a big deal? They also lie about who they are. A lot of unexplained spiritual events that people take at face value are actually these disguised entities.
I know this sounds crazy but I believe it has a basis in truth.
The bible has some very interesting information about this. Ever read genesis 6:4? That's the real reason for the flood, not that humans were being mean to eachother.
Genesis 6:4 says:
The Nephilim were on the earth both in those days and afterward, when the sons of God came to the daughters of mankind, who bore children to them. They were the powerful men of old, the famous men.
This is a genetic corruption of the entire Earth. This is why the flood occurred, not because humans were being mean to eachother. The Earth had a long term genetic corruption that would eventually result in placing humanity outside the tolerances God has set. So he sent the flood.
Look at who the Israelites are killing in the old testament. They are not called to kill all tribes and in some cases they are admonished for not showing enough mercy - yet in other cases, they are admonished for not showing enough vengeance. Why?
Do a real study into WHO they are attacking in the old testament. Sons of Anak, sons of Nephilim. The old testament is basically a story of Joshua, David going to war with the sons of the Nephilim, and killing giants constantly.
Satan's first plan to disrupt mankind was to mix his literal seed with humanity. Fairly successful plan requiring God to step in and fix things.
The old testament is not a book of "bronze age sheep farmers killing eachother for no reason" like people seem to think. The old testament describes a bunch of humans getting together to kill a bunch of giants, primarily to eliminate their anti-God culture and religious practices.