Pazuzeus just wanted reach out with his power and let it wash over everything without care of the peoples or the spirits of the world.
He ignored the warnings and admonishments of The Triumvirate until they, with the help of the peoples, was bound in The Caves of Chaos with The Ritual of Binding
At least, that's what the Priests of Law say. The Disciples of the Wind say the wind was betrayed and that Necessity has no such rule that required Pazuzeus to be bound. Free things should be free.
That's what they say.