Why Did The Nazis Hate Communism?

Nazism is believes in fascism. And if my understanding of Nazism and Fascism isn't wrong than those guys believe that the government/furur owns everything and its a state run government. Concidering how Communism is pretty much the same thing why did the Communists and Nazis hate each other so much. Since their ideologies were soo similar shouldn't have have gotten along?

Why did Nazis hate Communists?
Why Did The Nazis Hate Communism?
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