I didn't think about this until the film Jesus Christ Superstar came out and it has Judas singing, "Who are you? What have you sacrificed?" Like you TATTElder, I started to think, this doesn’t make sense.
And on the universal sovereignty issue mentioned by Comatose, none of that makes sense to me either. If we, as humans, acknowledge that God cannot make mistakes, cannot be wrong, then it doesn’t need to be proved (the ultimate axiom if you like). And if we know that, then all the angels must have known that as well. So why did Jehovah throw his whole creation into chaos and evil to prove something that doesn’t need proving? Not one of those angels would have thought, “hold on Jehovah, we think Satan’s got a point, we think you may be wrong here.” To which Jehovah replied, “oh dear, I’d better prove myself then hadn’t I”. And then 6000 years of evil follow. Where's the logic in that?