Who but God?

“Behold, I am against you,” says the Lord of hosts.  “I will lift your skirts over your face, I will show the nations your nakedness, and the kingdoms your shame. I will cast abominable filth upon you, make you vile, and make you a spectacle. It shall come to pass that all who look upon you will flee from you, and say, ‘Nineveh is laid waste! Who will bemoan her?’  Where shall I seek comforters for you?”   Nahum 3:5-7

Was the sin of Nineveh an affront to God’s righteousness?  Did their wickedness bring dishonor to God’s name?  Was the justice of God satisfied through their destruction?  Is it correct to think of God as the Great Punisher?  How can God be Holy and Just if He is not also Wrathful?  What is the wrath of God?  If, as the Scripture says elsewhere, ‘the wicked nations will be cast into hell’, who but God could be doing the casting?