And what harm was being done by traders entering Terran lands to trade? Oh and a priest headed to Zuma lands to speak to Haktoo.
It broke the treaty.
What Treaty?
The Demyansk AccordThe treaty that said the borders were closed unless specific permission was given by either nation for the other nation's nobles to pass through.
Look, just because your character doesn't realize Allison is scheming and manipulative and only tells your realms biased info, doesn't mean you the player has to believe that, too.
And yes, it was an actual in-game treaty too. It was replaced by the "Terran Reiteration of Sovereignty" when Kabrinskia started sending nobles in to purposefully violate the Demyansk Accord.