So frequently I see moral references in the OT prophets that mirror the teachings of Christ. God repeatedly calls for His people to treat others with righteousness, not to pervert justice, to take up the cause of the poor and the widows, to reject bribes. Many times these are the charges He levels against His people when explaining why the foreign invaders are coming to destroy them. Keep in mind, this invasion by outsiders is not a rash decision – generations have gone by in which God repeatedly sent His prophets to call the people to repentance. Eventually the consequence of disobedience must come. God is also clear that the earthly instrument who enacts this judgment is liable for all the crimes committed during that act – hence the prophecies against Assyria for their part in the fall of Israel, even though that fall had been decreed by God.