Saudi Sunnis and Iran’s Shiites—Why the U.S. Can’t Support Both

The stakes for the West have never been higher in the Middle East, only this time, it’s not just about oil, Kuwait, or al-Qaeda. It’s about a possible full-fledged tribal war between the Sunnis of Saudi Arabia and its allies vs. the Shiites of Iran and its supporters. In the middle is the growing band of Islamic radicals who want to rule the world.

Fighting ISIS makes strange bedfellows. The United States is now supporting Iran — a member of President George W. Bush’s “Axis of Evil” — with airstrikes in an effort to keep ISIS from gaining in Iraq. Just to confuse things even more, the administration is also supporting the Saudis in their efforts to keep Iran-backed Houthis from taking over Yemen.

Related: Saudi Arabia, with US Support, Attacks in Yemen

The Saudi-led air campaign against the Houthi positions in Yemen is just the latest step Saudi Arabia has taken to ensure that the delicate political balance of the Middle East stays to its liking. The Saudi actions have sometimes come with unintended consequences, and have even started a new spate of conflicts in the troubled region.

Saudi Arabia has been an ally to the U.S. since the establishment of the Kingdom in 1932. It enjoys a strategic location with a massive size and coasts on both the Red Sea and the Persian Gulf. It is also the largest oil exporter in the world. Moreover, it is the birthplace of the Islamic faith and hosts the two holy sites of Kaaba in Mecca and the Nabawi mosque in Medina. But while all that helps Saudi Arabia play a prominent and unifying role, it also harbors Wahhabism, an extreme interpretation of Sunni Islam, making the Kingdom a dividing force in the region.

Wahhabis are the most anti-Shiite group among the Sunni Muslims. This is one of the reasons Saudi Arabia is in a regional competition with Iran, which is ruled by adherents of an extreme Shiite version of Islam. While the Obama administration was retreating from Iraq in 2011, and as the Arab Spring was emerging, the worried Saudis began a series of military interventions throughout the Middle East. They planned to protect friendly autocratic governments, overthrow others and attack rebel groups.

The Saudi actions began in the small Shiite-majority kingdom of Bahrain, which is ruled by a Sunni royal family. The Saudis provided a small contingency force to suppress the Bahrainis who rose up against their government in 2011. In that case, the Saudi motivation to keep a Sunni government in power was combined with the fear that the fall of the Bahraini royal dynasty would open the door to similar uprisings in Saudi Arabia and other Persian Gulf countries. Add to that the presence of a suppressed Shiite minority that lives in the oil rich eastern region of the Kingdom and the fear that Iran could control Bahrain — all were factors in the Saudi decision to act in Bahrain.