Behold, you will conceive in your womb, and bring forth a son, and will call his name 'Jesus.'
JESUS ... is the New Testament form of the Old Testament "Joshua," and has the meaning, "Jehovah is salvation."  Matthew's account quotes the angel as giving the reason why this name was chosen, "For it is he who shall save his people from their sins"  (Matthew 1:21).  Thus, the great purpose of Jesus' entry into our earth life was not political or secular, but redemptive.