In essence, fascism was explained at the end of the 20th century in the following way: capitalism was considered to be in a historical epoch of decay and decline. From 1928, the temporary stabilization of capitalism was considered to have ended and the current period was defined as revolutionary, in the sense that the revolutionary seizure of power by the working class had once again been put on the agenda as the first item.
The main slogans of the Comintern, (in sweden anyway) became "class against class" and "Soviet power". In this dire situation, the bourgeoisie resorted as a last resort in the crisis, either to relying on social democracy (the left wing of fascism) or outright fascism. The Comintern consequently saw fascism as a reaction of the bourgeoisie to the challenge of a revolutionary working class/workers' movement. The Social Democratic and the Fascist parties were identified as different wings (left and right respectively) of the reaction that had become the last refuge of the bourgeoisie.
In this definition there is an attempt, albeit an erroneous one, to determine the historical period in which fascism appeared. On the other hand, there is no attempt to specify the fascist movement and the state. During the period 1928-34, the Comintern refused to see any fundamental difference between bourgeois democracy and fascism. The result of this confusion of the character of the different parties and types of state led to fatal consequences for the working class and its political organizations.
It is reasonable to have concerns that communist organisations are now repeating this error. The main concern comes with the first steps of apartheid being taken in Denmark.
[While I am not Danish, I am a Swede. And I am an ethnic and gender minority. Despite being a third generation immigrant, I have still faced discrimination and alienation from my own nation]
Social democracy is the right wing of dengism.