Is Iran spreading a Shia empire?

Iran is now waging a proxy war against Saudi Arabia and Yemen by supporting a radical sect of Zaydi Shiites described as the Houthis, after the founder of their movement. The Iranians aren’t merely trying to destabilize Arab countries that are aligned too closely to the U.S.; they are trying to create a Shiite empire extending from Iran through southern Iraq to Syria — where the Alawites, an offshoot of Shiite Muslims, are in power — to Lebanon. Now Iran is trying to create a Shiite enclave in northern Yemen. If Iran gets nuclear weapons, it is easy to predict where they will go next: Bahrain, whose population is majority Shiite, and Saudi Arabia’s Eastern Province, which conveniently for Iran is 75% Shiite and is the location of 90% of the country’s oil.