If you had asked me just a couple of weeks ago I might have assured you that Pakistan is the last county with which the Islamic Republic in Tehran would pick a fight. I might have cited many reasons for that opinion. First, A recent demise of the classical reasons for antagonism between nation-states.Their border, almost 1,000 kilometers long, was fully demarcated in 1964, ending ambiguities left behind by the British when they withdrew from the subcontinent in 1947. Relations were never marred by irredentist pressures on either side.