Jesus confounds them again, healing a man and giving them a sign they can't handle, that doesn't fit in their paradigm. They follow Moses, not Jesus. They don't know where Jesus is from (funny that earlier they rejected Him because they knew He was from Galilee; now they don't know).
The man healed understands Jesus' work better than the Pharisees do.
Jesus is the door, the shepherd, not the Pharisees or Sadducees. The latter fleece the sheep with Rome, so they don't lose their position. Jesus refers to Israel's restoration and resurrection in Ezekiel 37 - one flock, one shepherd. Then that He has a mission to lay down His life for the sheep.