Iran and its allies said Israel will face harsh retaliation for the assassination of Hamas leader Ismail Haniyeh in Tehran, a brazen attack that dramatically ratchets up tensions in a region already on edge. “The criminal Zionist regime [Israel] has murdered our guest in our house,” Iranian Supreme Leader Ayatollah Ali Khamenei said. “There will be a severe punishment.” Haniyeh had led Hamas’ political operations for years. He was based in Qatar rather than in Gaza, where Israel’s military has been waging a war to completely eliminate the Palestinian militant group since October. UN Security C…