After the fascist and Nazi regimes were defeated in 1945, European post-war historiography largely overlooked right-wing extremism. New research now shows how extremists rebuilt cross-border networks in Europe and the part Switzerland played.
For more depth on the usages of Fascism and it’s history, context etc. see this link about this new book. Facsism" by Princeton History Prof Federico Marcon.
The faster we recognise it, the better we can counter it.
Just because every fascist country was a capitalistic country doesn’t mean that it needs to be that way or that that evolution is inevitable. By the same line of logic you could argue that communism leads to autharianism, which happened at least most of the time, but I’d argue it’s not inevitable.
It’s the worst in mankind that leads to fascism but inherently it’s in and outgroup behaviour routed in insecurity and alienation that is the cause of that thinking.
There are several examples of socialist countries that became fascist because of cspitalism. Read a bit about 9/11, the most tragic one, and you start seeing a pattern of contagion.