When the Iran-backed Yemenite Houthi rebels took responsibility for the attack on Saudi oil facilities, the claim at first seemed credible, as the Houthis have previously used drones against the Saudis. But further investigation suggests that Iran attacked the oil fields itself, with cruise missiles launched from its own territory, likely alongside drones. Dore Gold points to a single reason why the Islamic Republic would move from conducting a proxy war with Saudi Arabia to more direct conflict: the ayatollahs have not yet encountered retaliation, and they will continue to escalate until they do. (Video, 8 minutes. Text available at the link below.)
Read more on Jerusalem Center for Public Affairs: http://jcpa.org/video/iran-moves-directly-against-the-saudis-dropping-the-pretense-of-a-proxy-war/