And Jesus entered the temple and drove out all who sold and bought in the temple, and he overturned the tables of the money-changers and the seats of those who sold pigeons.  He said to them, "It is written, 'My house shall be called a house of prayer,' but you make it a den of robbers." Matthew 21:12-13 (ESV)
Just in case they weren’t ready to take him I guess. Jesus comes in and causes a commotion. Throws tables over, runs people out with whips. Drives them out.
Today it is considered bad form to get into a polemical argument with a a false teacher, taking advantage of the poor faithful sheep, or those who would just like to be faithful sheep. I don’t know, I guess the moral of this story is, there is a place and a time for polite, and there is a time and a place to defend the house of God, the Body of Christ that is his temple.