Then one of them, named Caiaphas, who was high priest that yaer, spoke up, "You know nothing at all! You do not realize that it is better for you that one man die for the people than that the whole nation perish."
He did not say this on his own, but as high priest that year he prophesied that Jesus wo0uld die for the Jewish nation, an not only for that nation but also for the scattered children of God, to bring them together an dmake them one. So from that day on they plotted to take his life.
John 11:49-53. I find it very interesting that even the Pharisees were, in effect, doing God's will. We benefit from knowing the end of the story here. As John recites his story, it becomes clear that God is working through the actions of those who didn't believe that Jesus was Christ. In fact, those actions condemning Jesus to death truly made Jesus our savior, since without the sacrifice we would not be forgiven for our sins. I find this a very interesting example of how God works in the world, bringing to fruition plans that would give birth to the Christian Church by utilizing the actions of the Pharisees.
The part of this that really bakes my noodle, though, is whether our sin can be part of God's plan, and whether these actions should rightly be called sin if they carry out the will of God. That distinction is no doubt for another, far longer, and more confusing post.