RIYADH: Iran's top diplomat preached unity and dialogue during a visit to Saudi Arabia on Thursday, his first since the two Middle East rivals announced a surprise rapprochement in March.Hossein Amir-Abdollahian also took the opportunity to reiterate the Islamic republic's support for the Palestinian cause at a time when Riyadh is in discussions with the United States about potentially normalising ties with Israel.Ties between Sunni-majority Saudi Arabia and Shiite-majority Iran "are progressing in the right direction," Amir-Abdollahian told reporters at a press conference with his Saudi counterpart Prince...