Don't worry - once the town is sacked and most of the people are put to the sword, Avar will have a chance to save everyone and prove that he was right all along. The survivors will be rightfully miffed at the Duke and you'll restore any prestige your church has lost (and you can then lead a pogrom on the cabal of guild leaders). So yeah - silver lining.
And there's going to be a party! I hope there's cake!
Avar is going to go rogue and spike the punch with rum. Good rum. Then, when he gets the karoake and dance line going, everyone will see that this Imperial didn't come to plunder but to party.
Our adventures continue in Ch. 15: The Ties That Bind.
Wæs se grimma gæst Grendel haten,mære mearcstapa, se þe moras heold