There is another Babylonian captivity coming. The church is going to see troublous times. She is going to prophesy in sackcloth. Do not let any false prophet tell you otherwise.
God had not spoken peace. He appealed to the people to repent. The time came when, because of their sins, the Babylonian captivity was allowed, as the lightest punishment that could be given, and even then, God decided to make their lot lighter by telling them to cooperate with their conquerors.