What benefit Muslims gained by converting Persians to Islam?

Well, for one thing, muslim Iranians are nowhere near the extremist Wahhabis who treat their women like dirt and blow themselves up in the name of Islam. They are the best muslims in the world. They send a hijabi soccer team to the Olympics (which was banned for not conforming to the FIFA soccer dress code), they let their women study (60% of all university students are women) drive, work,sing and even dance freely (they call it fine movements) and all under the banner of Islam. They're very smart and know how to work their way through Sharia law to make it easier yet still abide by the law of Allah. We're in the middle of Afghanistan and Iraq, but enjoy a stable and safe environment free of muslim fanatics threatening to blow up others. Let this be a lesson to you....