"See the Name of the Lord comes from afar, with burning anger and dense clouds of smoke; his lips are full of wrath, and his tongue is a consuming fire." NIV translation
Isaiah continues to describe the moments just before the start of the Millennial Reign and, here, he describes the second coming of Jesus Christ. This is a stark contrast to the peaceful baby being born in a manger as we see that Jesus' return is with wrath at the fact that so many have rejected Him and His authority.
"His breath is like a rushing torrent, rising up to the neck. He shakes the nations in the sieve of destruction; he places in the jaws of the peoples a bit that leads them astray." NIV translation
Isaiah describes Jesus' return as being as unstoppable as a river at flood stage and he tells of the fact that the nations have been drawn to Jerusalem. We might ask what is the "bit" that Isaiah speaks of is talking about. It speaks of the false belief that man can do anything if we would just all band together. This is the ultimate act of idolatry as the people band together in an attempt to take control of the city of Jerusalem even though God has set aside that city for Himself.
"And you will sing as on the night you celebrate a holy festival; your hearts will rejoice as when people playing pipes go up to the mountain of the Lord, to the Rock of Israel." NIV translation
Here, we see a clear separation of God's people and those who have rejected Jesus Christ. Those that have rejected Him and come against His city are subjected to judgment while His people sing and rejoice. This is a reminder to us that, if we wait on the Lord and His timing, He will take care of those who threaten His people.
Today, there are all kinds of man made efforts to bring peace to Jerusalem. We can choose to run after all sorts of people or governments to intervene on our behalf (much like Israel did when faced with the threat from the Assyrians) or we can confidently wait for Jesus to return to take up the fight.