On one of the main roads out of Dahieh, the name given to the Beirut suburbs now at the heart of Middle East geopolitics, a row of streetlights bearing the same photograph of Iran’s penultimate supreme leader, the late Ali Khamenei, seem to bid farewell to those leaving the area. A few meters further on, as the city of Beirut begins, the iconography that floods Dahieh with the faces of Iranian and Hezbollah leaders — its Lebanese allies — vanishes, as does, to a large extent, the threat of Israeli strikes.