The ideology of Judas and his betrayal of Jesus

Judas betrayed Jesus because his ideology clouded how he saw the Messiah

Judas betrayed Jesus. Then filled with remorse, he went and hanged himself. He obviously was not expecting Jesus to be arrested, or for things to go the way they did. His name is the traitor.
But why would he do this?
He had walked with Jesus for three years. He had heard the teaching and seen the miracles. He was part of the inner circle.
He betrayed Jesus for 30 pieces of silver, which was a good chunk of change, but it wasn't all that much. It wasn't for the money. And it is clear from the Biblical stories, the outcome was not what Judas expected.
It even seems that Jesus was egging him on in some ways.
The religious leaders wanted rid of Jesus, and they were looking for a way to make that happen. They were also well aware of the politics of the situation. It would be a public relations nightmare if they did anything to him. They needed someone to “lay the charge.” They needed an excuse, and they wanted the hated Romans to do the deed so they would appear innocent.
If it was one of his own disciples who betrayed him, that was even better, so they were happy to pay whatever price was needed. It seems Judas did what God wanted in some ways, it wasn't necessary for it to be him. That doesn't get him off the hook.
He still betrayed Jesus. But the question remains. Why? What could his motivation really have been?
It's always intrigued me, what happened after the betrayal.
Judas and many others of the day wanted Jesus to overthrow Rome. They wanted the Messiah to come, but they had formed the idea that the primary duty of the Messiah was to overthrow Rome and set up the kingdom of Israel again. Since that was what they wanted, and indeed that is part of the Old Testament prophecy, they had no room for any other kind of Messiah. Their anti-Rome ideology colored everything they saw, including how they saw the Messiah.
Judas may have thought his action would set the wheels in motion. Jesus would be arrested, he would call down angels out of heaven to rain fire on Rome, and would then lead the revolution. Judas' dreams for his country would be realized, and of course, he would no doubt hold a high position in Jesus kingdom. He may have even thought he was doing what Jesus wanted.
He heard the teachings of Jesus. Maybe he even heard Jesus tell them that he would be crucified and that he had come for that purpose. He might have even heard Jesus say blessed are the poor, turn the other cheek and so forth.
But Judas was blinded by ideology. He had an agenda and the Messiah was going to fulfill that agenda. He came to Jesus with preconceived notions as to who the Messiah would be, so it was hard for him to see the real message.
Thinking beyond the betrayal itself. How did Judas get to this point? How did his ideology affect his actions? How did his ideology cause him to miss the message? Is there a message here for us today? How does ideology affect how you perceive the world?