I am not entirely convinced that Satan was Lucifer.
Well, thats a complicated one, because multiple evil entities were mentioned in the Bible. If they are all one or separate is not clear.
In Old Testament itself it never says Michael is fighting Lucifer. It says already that Michael is fighting Satan.
Well, most people consider Satan Lucifer. I have actually never met a Satanist who makes the difference between those two. In the book "Rites of Lucifer", and "Draconian Ritual book", there is no shown difference between Lucifer and Satan there. So what would even be the difference?
In general, all fallen angels become demons rather than the devil.
Well, maybe, but then how did devil came into existence?
The name Lucifer comes up 1 verse only in the entire Bible. Satan was already there and Jews have Satan as well before he was devil.
How does that 1 verse make Lucifer different from Satan?
I fully believe the devil/Satan is here and is king of the demons.
Well, that is Bible's version of the story specifically.
I disagree he was Lucifer, he was a special entity already that had powers such as turning into a snake and possessing the vulnerable.
So who was even Lucifer then?