Intangible, the political statements of Hitler and Mussolini are fascist ideology. Mein Kampf is full of disparaging remarks against Marxism (much more so than remarks against liberalism, for example). Fascism is inherently anti-Marxist because fascism views the nation as the primary unit of social organization, while Marxism holds that "all history has been the history of class struggle". This clash of ideas (nation vs. social class) was extremely important to both fascists and Marxists, and they invested considerable time and effort to argue against each other on this subject. Indeed, fascism defined itself to a large extent as "the movement which is fighting Marxism today" (direct quote from Mein Kampf, chapter VII). Anti-communism isn't just a random aspect of fascist practice - it is a core tenet of fascist ideology. After all, fascism was born as a reaction against communism. 

 The section as it stands may be incomplete, but the right solution is to expand it.