Matt 10:34 Think not that I am come to send peace on earth: I came not to send peace, but a sword.
And when Jesus is called the Prince of Peace, that is because Christians think Isaiah 9:6 is about Jesus, but it is not.
Isaiah 9:6 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.
Jesus did not fulfil any of that prophecy and that's why the jews are still awaiting the Messiah. Isaiah was prophecies to the personage who will fulfil the return of Jesus belief, not Jesus Himself.
So you will be waiting a long time for Jesus to end war, like forever.
