Since I no longer believe in "Satan" or his "Demons" I don't really believe they are demonized, I think all humans have the ability to be evil if they so choose, I think that some rational and generally kind people, if placed in completely different circumstances and given absolute power can become corrupted and change the way they are, when you have no one to answer to and you are holding the cards, what you do after that shows your true character. That's the reason why I really doubt the GB members in control even believe in God, I think they know it's all a sham, and are just playing the part for the Corporation's sake.
Their behaviour with the R&F goes against what true God fearing individuals would do. The fact that they place the Organization first, speaks volumes about who their TRUE GOD is, and that's POWER and MONEY! The belief in Satan began much later for the Hebrews, in the beginning they believed good and bad came from the same god. Their time in Babylon exposed them to other ideas and beliefs and this contributed to some of the stories they adopted and made their own. So no, I don't believe they are demonized.
IC