When the ruler of the feast tasted the water now become wine, and didn't know where it came from (but the servants who had drawn the water knew), the ruler of the feast called the bridegroom,

 What enraged Jesus was that pilgrims to the Passover who could ill afford it, were being fleeced at an exorbitant rate by the money-changers. It was a rampant and shameless social injustice--and what was worse, it was being done in the name of religion. 