There is no doubt that most Western interests would prefer a Saudi ordered Sunni Mideast. The Saudis and the Israelis both have a common interest in Iran being weakened. Both find it intolerable that Iran has made such strategically significant inroads in Syria.Israel is terrified of Iran positioning mobile short range ballistic missiles in Syria which would hurt Israel badly if Israel attacks Iran. The Saudis unsure of their own stability cringe at the prospect of Shia strength in their own backyard. That is why both Israel and the Saudis are taking an extraordinary gamble to support al Queda led Islamists, which neither is sure they can control to overthrow Assad and throw the Iranians out of Syria. Yet none of these moves will bring long term stability to the region. It remains chaotic, backward continues to squander its resources and the masses remain impoverished. Doubt any one group, Shia, Sunni or Israel can dominate long term. BTW Russia has a severe problem with jihadists in southern Russia. It will do all it can to prevent nearby Syria from becoming dominated by political Islamists. Syria would then become a base and haven for the jihadists.
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How do the Wahhabi fit in?