Peace v. Sword

Matthew 10:34-36

34"Do not suppose that I have come to bring peace to the earth. I did not come to bring peace, but a sword. 35 For I have come to turn " 'a man against his father, a daughter against her mother, a daughter-in-law against her mother-in-law - 36a man's enemies will be the members of his own household.

As a pacifist, I have to admit that I just don't understand this passage. At all. Would love to hear your thoughts.