With respect, I think the rest of this board (apart from Gofer Blue) would agree with me in saying alien involvement in ancient civilizations is a much more likely explanation than angel or demonic involvement.

I had a colleague once, who thought like you. She believed every word of the Bible and made jibes about my catholic upbringing. She also believed that planet Earth is about 6000 years old. I asked her - what about all the dinosaur bones? She said, oh the devil put them there. Interesting side story - years later, she left her job to pursue a degree in theology. By the end of those three years, she converted to Catholicism.