Peace with Shia

Could America and the West make common cause with implacable foe Iran to defeat ISIS and other Wahhab fanatics? Is Iran willing to give up the quest for nuclear weapons to rejoin the family of nations and finally vanquish the ideology of Sunni supremacy? Can the enemy of my enemy really be a friend? Even an alliance of convenience to counter terrorists in Iraq and Syria could start a lasting rapprochement. The ball is in Iran's court. The Islamic Republic of Iran must prove though that they are no longer sponsoring terror themselves and that the desire to "wipe Israel off the map" is no longer national policy. A great step forward would be openness about the atomic project which should be forthcoming if the enterprise is for "peaceful purposes" as Iran has continually contended.