Can Bad Be Used For Good?

I've just been doing some studying in preparation for the Easter Season.  One of the interesting things I have discovered is that God used the evil plans of the High Priest Caiaphas, and the rest of the Sanhedrin to fulfill his "Ultimate Plan" - the death of His Son, Jesus to pay for the sins of the world.  If I were a betting man, I would bet that those guys would not be very happy that their evil thoughts and plans actually promoted the cause of Christ.

What are your thoughts?