Final answer:
Nazi Germany practiced ethnic nationalism, underpinned by a belief in Aryan superiority and culminating in the Holocaust. This nationalism sought a racially pure German nation, excluding and persecuting Jews and other minorities.
Step-by-step explanation:
The form of nationalism practiced by Nazi Germany was ethnic nationalism. This was characterized by a belief in the superiority of the 'Aryan' race and a commitment to a racially pure German nation. The Nazis sought to unite all German-speaking areas of Europe, but their nationalism was exclusionary, tying the idea of being German to ethnicity, excluding Jews, Slavs, and other groups they considered inferior. The Nazi ideology included extreme hatred that culminated in the Holocaust, a genocide that remains the most grievous example of racially motivated mass murder in history. The influence of this nationalistic ideology spread across various aspects of German life, from politics to culture, with the goal of creating a totalitarian state that revolved solely around fascist principles.