God's in His Heaven, All's Right With the World?

Okay, I'm not a Christian, I'm not very knowledgeable about what Jesus said or how his followers interpret his words, but didn't he say "Put away your sword" several times? Didn't he claim to be the Prince of Peace, or didn't his followers give him that title? Did he ever suggest that anyone commit murder? So can anyone explain this to me?

Benshlomo says, The greatest blasphemy is using the name of God to justify what you wanted to do anyway.