Fascism is anti-communism and extremely nationalistic. It puts the state as an entity above the individuals that compose it (i.e. the goal is for people to glorify the state, not for the state to protect the individual and collective rights of its people). It's authoritarian/totalitarian, with power centralized in either a dictator (which can develop into a 'cult of personality) or a very small ruling group who maintain control through military strength. The state stringently controls all aspect of life: political, social, cultural, and economic. It tends to employ 'populist' ideas to get people 'on-board' (i.e. re-birth of the nation, reviving past glories, etc.), while at the same time brutally supresses opposition.
There's a certain 'victim mentality' to fascism. There's concern that the nation was 'held back' by others or 'polluted' by foreigners. Concern for 'purity' is common.
In truth, while North Korea is frequently described as communist... at this point, it really does fit the definition of a fascist state. And that's not uncommon. Fascist movements frequently start seemingly left-leaning.
