"The primary theme of the movie is racism and fascism," D'Souza tells The Hollywood Reporter. "Look at the timeliness of this with the immigration debate, where Trump is being called a 'Nazi,' 'fascist' and 'racist.' This tells me that people don't have a clue, not only about the history of fascism and racism, but where it exists today."
This is pretty much the alpha and omega of it.
There are several posters here that have tried to make that exact argument.I was reading a few reviews of this movie yesterday, mostly because it's not everyday you see a movie with a Metacritic score of 1. I made the horrible mistake of reading the comments on the Rogerebert.com review. It's full of people claiming that Nazis were politically on the left. Their key argument seems to be "socialist is right in the name"... ugh. I can understand, to some extent, being ignorant of history, but these people double down on their non-sense when others try to correct them.