The Shiite Persian Leaders tried to lure the Arab Sunni Leaders into supporting an all out war against Israel over the treatment of Hezbollha. The Arab Sunni leaders were forced to make a choice. One path lead to a satisfaction of their ancestral hatred of the Jews by assisting the Hezbollha in taking over Lebanon and eventually Israel. At the end of that path however was a stronger Persian Nation because Hezbollha are the Iranian leaders terrorist. The Iranian leaders were assuming the Sunni's would choose to join the fight against Israel. The other path available to the Arab Sunni's was to put away their ancestral hatred and to deny the Shiites any strengthening.
So perhaps the Iranians are now scrambling to implement plan B.
Don't forget the Sunnis ancestral hate of shiitism. And the fact that if there is going to be an all Islam caliphate, they don't want it to be Persian...