If Iran is exploiting the 'Shia factor' in its foreign policy then it is wrong. But I believe this to be untrue. I visited Lebanon five or six years ago when I was parliamentary speaker during Khatami's era and we exerted all efforts in preserving the unity between the Sunnis and Shia.
Mehdi Karroubi: Iran's Most Prominent Reformist Speaks, Asharq Alawsat April 2007