How is nationalism related to ethnocentrism?

nationalism mean extreme pride for ones nation. the Nazis thought that their country(Germany) was the best out of all the rest of the other nationalities. they believed this so much that they decided to get rid of the inferior races. and that's how the Holocaust came about. it relates to nationalism a whole lot.

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Hitler believed that Germany was better than every one else and wanted to get rid of the Jews and others because he thought they were inferior.