nationalism is a political ideology that involves a strong identification of a group of individuals with a political entity defined in national terms, i.e. a nation. In the 'modernist' image of the nation, it is nationalism that creates national identity. It can be a belief that citizenship in a state should be limited to one ethnic, cultural or identity group, or that multinationality in a single state should necessarily comprise the right to express and exercise national identity even by minorities. (wiki