In the careful architecture of international diplomacy, trust is both the foundation and the first casualty of suspicion. This week, Sweden and Iran exchanged expulsions of each other's officials — Stockholm citing violations of the Vienna Convention and threats to its citizens, Tehran calling the move a capitulation to Israeli influence — leaving both capitals in a standoff that reflects not merely a bilateral quarrel, but the deeper fractures running through Iran's relationship with the Western world. What began as a single expulsion has become a mirror in which each side sees the other's ba