Ultranationalism is an "extreme nationalism that promotes the interest of one state or people above all others", or simply "extreme devotion to one's own nation".
Ultranationalism combined with the notion of national rebirth is a key foundation of fascism.
According to Janusz Bugajski, "in its most extreme or developed forms, ultra-nationalism resembles fascism, marked by a xenophobic disdain of other nations, support for authoritarian political arrangements verging on totalitarianism, and a mythical emphasis on the 'organic unity' between a charismatic leader, an organizationally amorphous movement-type party, and the nation".
Roger Griffin asserts that ultranationalism is essentially xenophobic and is known to legitimise itself "through deeply mythicized narratives of past cultural or political periods of historical greatness or of old scores to settle against alleged enemies". It can also draw on "vulgarized forms of physical anthropology, genetics, and eugenics to rationalize ideas of national superiority and destiny, of degeneracy and subhumanness".
^"Frankenstein pact puts AfD in coalition". The Times. 23 July 2019. A married couple have run into trouble for forging the first local pact between Angela Merkel’s party and the ultranationalist Alternative for Germany (AfD) in defiance of the chancellor.