chauvinism
Chauvinism (noun) means an extreme and aggressive belief that your own country is better than others.
Etymology
Borrowed from French chauvinisme (“idealistic devotion to Napoleon”), named for Nicolas Chauvin, a legendary and excessively patriotic soldier of the French First Republic. The figure of Chauvin became especially famous as a character in the play La Cocarde Tricolore by the Cogniard brothers.