I just wish the show had done a better job of explaining just how vile this treachery was, by betraying Guest Rights.
"The guest right is a sacred law of hospitality. When a guest, be he
common born or noble, eats the food and drinks the drink off a host's
table beneath the host's roof, the guest right is invoked. Bread and salt are the traditional provisions.
When invoked, neither the guest can harm his host nor the host harm his guest for the length of the guest's stay.
For either to do so would be to break a sacred covenant that is
believed to invoke the wrath of the Gods both old and new. Both the
teachings of the Old Gods and the Faith of the Seven hold to this. Even robber lords and wreckers are bound by the ancient laws of hospitality. "