Lord of the Wounded (Matthew 12:15-21)

Jesus goes away and stops interacting with the leaders of Israel.  He simply leaves.  The implication seems to be that Christ has to wait until the appropriate time to go to the cross so he needs to avoid controversy at this point.  This is true, but Matthew tells us something else about Christ withdrawing and going away.  How does Christ silently removing himself from a scuffle with the pharisees confirm his messianic mission?