People from the Middle East have been considered "white" in the United States for some time, but since September 11, anyone with brown skin who seems foreign or strange is now considered "different" and possibly an enemy. This is an example of

This is an example of Racialization

Explanation:

Racialization is the process of assigning racial or ethnic identities to a relationship, social practice or group. Racialization refers to the social relationships to which racial meanings are linked, the use of the term emphasizes the process of creating racial definitions and underlines the constructed nature.