[Galorme]

Re:The loss of power thing

Don't get confused, Saruman was made, in all intents and purposes, into a man. He was given a human body with Ainur powers, and after Gandalf removed his powers he became nothing more than a man with a "ghost in the machine".

Now then consider this: an evil deed is evil regardless of who it is performed against. Killing someone, without honour, in his or her sleep, would be evil. Morgoth was evil, but that does not make the deep any less evil. Anyway it wouldn't have done much, if he could have destroyed his body he probably would have just done something similar to Sauron (with the eye and the fire etc).

The other thing to remember was that Tolkein was raised as a Christian, and a lot of the Christian religion talks about Rebelling against authority to be wrong. ("he who protects authority against rebellion must not himself rebel").