Well, what about them! They don't want to negotiate. They don't want to ally. Instead of offering: "let us clear the rubble, and you fuck off out of here" — the whole friendly army, maybe except the Grimms, would have said: "YES!"
And now what? Now it's only a pain in the ass. Now the future emperor of Tezoth and Ikazkan, Eugene, will be causing trouble everywhere. Because we have good XP.
The rusty one has only one chance to survive, but given the state of the counter, the probability of that isn't very high.
Oh come on, we already figured out that the priestess of the Dawn Raven will bring him back, and he'll screw everyone over.

