We prop up dictators. Why do we act surprised when people overthrow their dictators, whom we supported, and hate us for having oppressed them?
All of the tyrants we support are worse than the British ever were to us. And we fought and killed many of them. Why do we expect others to react more kindly to more brutal oppression?
This is beside the simple point that no, they are not a threat to our national sovereignty or our citizens. These are not the same issues nor arguments:
1) Iran is not a threat to us. Period. Einstein thinks Syria has the Boomerang system for locating shooters; all of his arguments are not only amateurish, misleading, and ignorant, but also riddled with embarrassing lies of expertise. He accepts the fear-mongering of those in power who want him worried about a foreign threat while their rights are steadily taken away at home. It's the same thing Iran's government does to its people.
2) We need to stop pretending our hands are always clean and everyone who hates us is a big bad meanie. Yes, many of them are. But we choose to be there. We choose to give dictators billions; we choose to oppress people. We shouldn't be doing that. We should know better. Our values should be better.
Neither of these points is a go-to or cop-out if the other fails. They're separate points. They both just happen to support the notion that maybe we should reevaluate our Middle-East policy of fear-mongering and oppression (both at home and abroad).