The Middle East has been torn by a polarizing feud between Sunni-majority Saudi Arabia and Shiite-dominated Iran. DW examines the tense relationship and why both countries are fueling regional conflicts. Divisive rhetoric serves Saudi Arabia and Iran's interests in the Middle East, but sectarianism is not the root of conflict between the two Muslim-majority nations. Rather, the tense relationship between Riyadh and Tehran revolves around power and influence, whether in Syria, Iraq, Yemen, Bahrain, Lebanon or at home. US: 'Twin pillars' policy With support from the United States, Riyadh and Tehran attempted to improve ties during the 1960s, Saudi Arabia's King Faisal and Shah Mohammad Reza Pahlavi making official state visits to each other's respective countries.