I fail to see how anything good can come of this from Terran's perspective. What on earth could Terran stand to gain in this situation through conflict, military or political? They've somehow managed over the course of a few days to badly damage Terran's relations with the Theocracies, which is really saying something... Terran had a fair amount of goodwill built up with us.
That's a modern speaking.
You assume "Terran" has a perspective. It doesn't. Numerous Terran nobles have perspectives. As it would happen, one of them is a former duke who built a large power base for himself, slowly building up a reputation for competent domestic management, and deft handling of issues, foreign and domestic. If Hireshmont doesn't get what he wants in this affair, it'll be the first time he's ever lost: at anything, ever. He isn't used to losing.
Plus, there's a huge culture gap. For Hireshmont, not commenting on the exact details of a treaty is pure animalistic barbarism. As far as he concerned, we are separated from the monsters by our ability to write complex legal documents. Thus, Brance's arguments are pissing him off.... because Hireshmont has always argued in Terran for friendly ties with Astroist and a very moderate stance towards Astroism, based on the fact that they were decent, civilized realms, sharing the goal of pacifying the wilds... but this conflict is causing an existential crisis for Hireshmont as he wonders if Astroists are actually humans, because they seem incapable of negotiating a treaty, which means, obviously, they're not actually humans.
