You did part of it. However it's my fault for not being clearer.
How can God judge the dragon and his angels, condemning them to the lake of fire if He God were making them do what they do, wouldn't He be judging them for what He did?
Ah, let me go over this part. Sorry for not understanding what you were asking earlier.
If God is all powerful and all knowing, and if the angels serve Him without free will, and if the Book of Revelation is taken literally, then yes, God is judging them and condemning them for following His orders. That's a lot of "if's." Let's start with what we know...
We learn that God is omnipotent from Revelation 19:6 KJV
And I heard as it were the voice of a great multitude, and as the voice of many waters, and as the voice of mighty thunderings, saying, Alleluia: for the Lord God omnipotent reigneth. The KJV wording has been revised in modern translations, but the descriptors mean the same thing.
We learn that God is omnipresent from none other than King David. He is asking where he can hide from God in Psalm 139:7-12, but answers himself (no where). Incidentally, in verse 8 the Hebrew word sheol (grave) is correctly used by the NASB. In the KJV, it uses the word hell, and is one of the many places that the KJV incorrectly translates sheol. Just a FYI.
God being omniscient is more difficult to prove and support. The Bible does tell us that God perceives all things, he knows the secrets of your heart, and no darkness can hide from Him. No creature is hidden from His sight, no question unanswerable. However, the Bible also supports the idea that God does not know which choices you will make, given free will. If you remember back in Genesis 22, Abraham was tested to see if he would follow God's orders to sacrifice his son Isaac. Right as Abraham was about to use his knife, God's angel calls out to him, stops him, and God goes on to say "...for now I know that you fear God, since you have not withheld your son, your only son, from Me.” God was testing Abraham to see if he would obey, but did not know what choice he would make. This is another piece of evidence toward the proof of free will.
So, we have established the power, presence and knowledge of God.
What about the angels? All the angels mentioned in the Bible perform certain tasks. They are messengers, guardians, guides, accusers, and healers. Some do nothing more than sing and praise God by His throne. Whatever the task, they are empowered through God, and were created for a specific purpose. They obey God, as evident by Psalm 103:20 NASB. There is no verse that states whether or not angels have free will, although plenty of verses imply both, depending on what part of the Bible you are reading. In the OT, absolutely not. In the NT, absolutely! Satan could not wage his war and convince 1/3 of the angels to follow him against God unless they had free will to choose sides. That is, of course, if the Book of Revelation is a literal account.
So, the answer to your question (and I apologize for the lengthy, scholarly lesson) is that it all hinges on the Book of Revelation and how it is to be received. The entire book is prophetic; an account of visions and dreams of the future that John had, while he was in exile on the island of Patmos. This raises the question of John's mental state. Was he delusional? Was he suffering from malnutrition? Sleep deprivation? Bad water? Sickness? Torture? We don't know because the Bible doesn't say.
Numerous theories and interpretations have developed over Revelation. It would seem that
IF Revelation is taken literally, then God is not judging Satan and the angels unjustly because they rebelled against Him. That is a very big if...and contradicts the OT teachings and several angelology positions.
Now for my personal opinion about something, and no this is not supported directly by scripture. In studying human psychology, we don't like to be responsible for our actions and poor choices. We want to place blame on any number of things other than ourselves. Very few people have the courage to own up to their mistakes. Pride gets in our way. Envy, lust, hate, etc. It is far easier to not care, do wicked things, and be a sinner than it is to walk the straight and narrow. Whether it is 1 AD or 2013 AD, people want to point the finger at someone, or something, other than themselves. Satan becomes Public Enemy #1 because of it. They gave the people a scapegoat.
Moses certainly did not blame anyone or anything other than the Hebrew people and the choices they made in Exodus chapter 32.