Iran has the Mullahs, I certainly don't want to downplay their role. After all, we tossed out the Iran nuclear deal.
It just seems a lot of these kinds of violent attacks are not really the nature of the Shias though, they will and can do it from time to time. Shiites bombed our Marines in Lebanon back in 1982, '83. They've done plenty as well but they are not ISIS which seemed like the devil incarnate on earth.