Rise of the Nazi party in Germany and Adolf Hitler became Fuhrer of Germany.
Explanation:
<u>Nationalism negatively affected Germany</u> because Adolf Hitler uses nationalism as a tool to blind the people of Germany to the <u>atrocities of his regime.</u>
Germany lost in First World War and the<u> treaty Versailles which devastated Germany politically, militarily and socially</u> and also accused Germany of the started first world war.
<u>Hitler seized this opportunity</u> of the downtrodden German people who are searching for the nationalist identity.