New Testament: (I understand the metaphor, but taken literally...)
“Do not think that I have come to bring peace to the earth; I have not come to bring peace, but a sword.” [Mt 10.34 NRSV]
“For I have come to set a man against his father, and a daughter against her mother, and a daughter-in-law against her mother-in-law; and one’s foes will be members of one’s own household. Whoever loves father or mother more than me is not worthy of me; and whoever loves son or daughter more than me is not worthy of me; and whoever does not take up the cross and follow me is not worthy of me. Those who find their life will lose it, and those who lose their life for my sake will find it. “ [Mt. 10.35-39]
That's why Christ came to break up the Jewish thinking and introduce a new form of religious belief. Which in fact he did.
Christ is not encouraging anyone to violence, just alerting his followers that they can expect trouble from all Jews including those Jewish family members closest to them. -Tom