The Germans were socialists and the Nazis were socialists who believed Marx was wrong about communism, but that he was right about capitalism. The Central Powers of Germany fought to their very last breath for the Social Democratic Party of Germany. They believed in Marxism and the magical way of life it promised them. It was a lie and the party betrayed them on the home front. I understand your point, but it's inaccurate. They then in turn paired up with the Communists and become barbaric towards their adversaries. Trump is compared to Hitler and Conservatives are compared to Nazis not because we actually are, but to shed the left-wings negative image as they make another attempt.