We are to emulate Christ in ALL he did. He was loving, and gentle in actions and in words most of the time, Jesus is stated to have visited the Temple in Jerusalem, Herod's Temple, at which the courtyard is described as being filled with livestock and the tables of the money changers, who changed the standard Greek and Roman money for Jewish and Tyrian money, which were the only coinage that could be used in Temple ceremonies According to the Gospels, Jesus took offense to this (extorting profit from the people to hear the word of God), and so, creating a whip from some cords, drives out the money changers, and turns over their tables, and those of the people selling doves Matthew[21:13] And said unto them, It is written, My house shall be called the house of prayer; but ye have made it a den of thieves. Now if we are talking about defending the House of God, is it alright to drive out those who physically defile it using aggression? We are also told to obey the Laws of the Land! The Laws of the Land, say NO. So I say NO. If we are talking about speaking the TRUTH firmly in defense of yourself, or of God, I say yes as long as you do not swear, demean, malign, or are guilty of it yourself!