Keep believing the propaganda that every other country that has different customs from ours is scary and evil. These kind of lies are perpetuated by people that stand to gain from divisive politics, arms sales and war. 

Iran, as both a country and a people, have a legitimate beef with the United States. Their countrymen have good reason to view us and our actions with constant skepticism, but, unfortunately, the average American citizen would have to have a functional understanding of world history to realize that.