ismaili/aga khani

ok, fair enough... if no human is in real connection wid imam mehdi, then what's the difference between 12ers and sunnis??? i mean, u said that The Ayatullah's interpret the laws through the Qur'aan and ahadith. sunnis also hav ulema who do the exact same job.. well if u say Ayatullahs interpret the quran correctly then why was there religious unrest (even amongst muslims) in iran after the islamic revolution??why were ppl killed even when the Ayatullah was the supreme leader and how can he allow this if he's the true interpretor of quran and hadith??