You would think with Israels success of finding so many terrorist leaders over the last two years that Iran would realize that it is not difficult to purchase information or intercept it. Why play Russian Roulette when you have an alternative?
Now perhaps the more difficult part, his successor. The Iranians must vote and elect their leader, if one is installed it is only going to lead to problems and counter insurgents.
Control the oil, charge China full price, drive oil price down to harm Russias war machine, increase profits on volume.