I think aliens (greys at least) definately are a what the Christian Bible calls demons or unclean spirits, or related somehow. When I was very young, I always had an irrational fear in connection to images of grays. The first time I saw a picture of one, before someone told me what it was, I got a chill down my spine. I don't fear them now, because I have no reason to anymore. The few times Ive awoken to night terrors, thinking to myself "Jesus Christ, please save me!" (not exact words) in complete seriousness and with sincerity, and the sensation subsided. There was once or twice when it didnt work right away however, but it's hard to concentrate any consistant thought when you're paralyzed and fearful for your life.

From what I've gathered, theres a power structure that looks like this:

Masses(us)-->Elite(leaders)-->Aliens(nephalim, etc.)-->Ascended Masters(the fallen ones)-->gOD of matter (Lucifer)

CE4research.com is an awesome website to check out if you are interested in this subject.