MUNICH - Saudi Arabia's foreign minister on Sunday rejected Iranian calls for dialogue saying Tehran was the main sponsor of terrorism in the world, a destabilising force in the Middle East and wanted to "destroy us.""Iran remains the single main sponsor of terrorism in the world," Adel al-Jubeir told delegates at the Munich Security Conference. "It’s determined to upend the order in Middle East ... (and) until and unless Iran changes its behavior it would be very difficult to deal with a country like this."Al-Jubeir said Iran was propping up the government of Syrian President Bashar Assad, funding the Houthi separatists in Yemen and violent groups across the region. He said the international community needed to set clear "red lines" to halt Iran's actions.