One has to look at the fundamental nature of the clerical regime in order to understand its true and ultimate intentions. Since its advent in 1979, the regime's leaders – starting with Khomeini himself – set out to export their radical ideology to the region and beyond. The primary mission (raison d'être) of the regime is to convert other regimes to its own mold with the goal of establish a modern-day Islamic Shi'ite Caliphate. It is so stated and defined in its Constitution as well as that of the Pasdaran's (Revolutionary Guards).
As quoted by Ahmad Zakaria, Al-Watan Daily: Interview With Reza Pahlavi Of Iran, Al-Watan Daily (Kuwait), Nov 27, 2007