A lot of it all depends on when and why his family came to this country. If they came here in the late 70s, because they were allies of the Shah and were afraid the Shias were going to kill them for being too secular, well, he might be a good guy. I knew a lot of Iranian muslims in college who were in this category-they did not observe most of the rules of their faith. The females didn't cover up-most didn't even wear a hijab. They were happy to be here and not be dead.
The Iranians (Persians) are a beautiful people, for the most part. Most don't look like Achminawackjob.