I'm not sating paranoia isn't present everywhere, i'm saying one one kind of political ideology use it as a building block of their ideology, and it is fascism.

"We are (culturally/genetically) the best, but right now others seems better/won/took advantage of us. The only reason we are not at the top is because we have internal traitors (jew/blochevics/unionist/homosexuals/whatever float your boat). We have to eliminate those"

Each time something like this is uttered to justify taking power away from court/parliaments, you'll be looking at fascism. Which can be used with capitalism or with communism (as production methods). The "internal enemy" as a reason to justify taking power away from the court/ignoring human right/taking power away from parliement is fascistic. [0]

That's mainly how i differentiate the extreme centre from fascists, their justification. Von Papen/Schleifer removed power from the Weimar parliament because "people are dumb and did not understood how intelligent we are, so we can safely ignore their vote", then Hindeburg installed Hitler, who did the same thing, but stronger, and justified it with the "internal traitor" myth.

[0] Trotsky called that "bonapartism", and argued that Stalinism was another heir of that ideology, but here, i think he is simply wrong (as usual), although it is interesting (where lie the fascism roots?). And now, writing about it, i will have to re-read him and think about it more, he might have a point, is fascism an evolution of bonpartism, with a more rigid hierarchical order? :/ fml.