Does satan exist, theories

Somone asked this question:
Christians, some Christians don't believe in Satan, I thought you all did?
Here a Christian guy said that he does not believe in Satan, I tought it was part of your religion?
LOOK AT THE ANSWER provided by micah
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* 13 minutes ago
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Additional Details

5 minutes ago
Who tricked Eve to bite the fruit?
WASN' IT SATAN?

SOOOO? I guess you don't even know your own religion!!!!!!!!!!!

I replied:

YEP
its a growing theory!

a movie called Bedazzled exemplifies the current belief from hollywood.
i do believe it has some jewish roots.

but any wicca christian believer will say the same thing. other christians will denounce that wicca can be christian.

I personally believe that fallen angels that existed from the pre-pre-existence are the source of demons and satanic possession(s). however Sorceries and mind control can also make it seem like a person is possessed through post hypnotic suggestions or PURE delusion separation of reality. Something like virtual sleep walking. but if possession is of the former than Satan Does exist.
if possession is of sorceries and mindcontrol, than its possible that satan is a superstition that is based on mind control alone.
i believe life exists on other worlds in the galaxies and i believe part of the war in heaven also includes worlds that rebelled against God being Surpreme ruler. All of these worlds can be the origins of satanic races and devil beings.
but its just a theory based on a few readings of URANTIA.