Jesus is not always the pacifist.
John 2
13 And the Jews' passover was at hand, and Jesus went up to Jerusalem, 14 And found in the temple those that sold oxen and sheep and doves, and the changers of money sitting: 15 And when he had made a scourge of small cords, he drove them all out of the temple, and the sheep, and the oxen; and poured out the changers' money, and overthrew the tables; 16 And said unto them that sold doves, Take these things hence; make not my Father's house an house of merchandise.
(Also, Matthew 2:12-13 and Mark 11:15-17.)
Luke 22
35 And he said unto them, When I sent you without purse, and scrip, and shoes, lacked ye any thing? And they said, Nothing. 36 Then said he unto them, But now, he that hath a purse, let him take it, and likewise his scrip: and he that hath no sword, let him sell his garment, and buy one. 37 For I say unto you, that this that is written must yet be accomplished in me, And he was reckoned among the transgressors: for the things concerning me have an end. 38 And they said, Lord, behold, here are two swords. And he said unto them, It is enough.
In the Book of Revelation, Jesus is the warrior king, waging bloody battle against the forces of evil.
The Bible does show that there are times that it's necessary to take up the sword against evil.