Jeremiah watched the crumbling of his beloved nation. Inspired by God, he wrote a book about it. It's called "Lamentations". Though God raised up Babylon to punish Israel for their sins, it was not a joyous thing, but lamentable indeed. And He raised Babylon, not because He loved Babylon, nor because they were righteous, but because He loved His people, and saw to their discipline; but He hated Babylon whom He raised up, for they were evil to the core, and in due time saw to their just deserts, and reduced Babylon to dust. O that He might grant us repentance, and visit His enemies today.