Your last message states your reasons clearly as you say, "I cannot stop your army...", "anything and everything I can do to reduce your gains from your victory will be done. Anything at all."
So you are exactly stating you are killing your population because you are losing. Would have expected you to show your army in attempt of defence at least, but everyone fled to the capital to pillage it even before anything was decided on the field even. A sad loser.
[to Jotunheim: please receive these gems as a gift from the eunuchs frenzily killing themselves
/Z]