The comments were much more factual then the article.

The Nazis used racism and nationalism to sell their socialism (National Socialism, ie: Nazism) and the communists used class hatred and internationalism/globalism to sell theirs.  They change their marketing tactics depending on what works for the particular people, but the end result is the same: millions dead, the people living in fear under totalitarian rule.

The guy in the video is mistaken, Nazism (fascism) and Communism do share idealogies, in that they are both socialist movements, and all started as part of the same movement. The main difference is fascism involves nationalism whereas communism involves internatiolism. The nazis just took it one step further and included rasism..  Hitler, Stalin, and Mussolini were all part of the same socialist/Marxist movement in the early 20th century.