My answer is not to trust the Terrorists.
Yes; there are many Persians (which is what they prefer to be called) who escaped from Iran when the Shah was ousted and the extremists took over. I even knew the Shah's family....they were our clients when I worked in LA. And while living in LA, I met Persian doctors, architects, and "average Joe" Persians. They are a very hospitable people, kind, and thoughtful. They have a different upbringing than I, different customs than I prefer, especially as relates to men/women, however, these were hard-working, honest men and women, good people. Yes, I would trust non-extremists Persians (whom the world calls Iranians). I do not trust any fanatics from any country, regardless of their religion. Fanatacism is a major problem in every country, in every religion.