This work seeks to understand what led Iran to move from a role of an ally to an enemy of the United States. Seeks to understand how the hostilities which now exist only between Iran and the United States were produced as a threat to all international community. To the extent that the United States play a leading role in this, a country that is a threat to the United States happens to represent a public menace. The Islamic political nationalism will be presented as a form of resistance to the logic of modernity. The breaking point occurred between these nations, according to the American view, in 1979 with the so-called Iranian Revolution - and therefore with the kidnapping of the American embassy in Iran , in return the time to break this relationship in Iranian view was in 1953 with the coup d état that deposed Prime Minister Muhammad Mossadeq. Should also take into consideration that this characterization of a country as a whole, their politics, religion, development programs, etc as threatening is a process of constructive values. This paper attempts to denaturalize this image "threatening" Iran has in the international community, which creates the conditions of possibility for violent actions directed to that State. This will be used to post-colonial theory, since postcolonial authors believe that the economic dominance of the West over the East, made possible mainly by colonialism, was able to encompass also the cultural domination of these peoples.