The best description of it is found in Trotskys pamphlet: Fascism what it is and how to fight it. (Actually a collection of what he wrote about fascism in other places). Because he describes the class character of it by examining how it emerged in say Germany and Italy.

Ultimately as the contradictions of capitalism come to a head the proletariat begins agitating (labor Union movements, communist or labor parties, strikes, mass protests, insurrection and revolution) to overthrow the bourgeoisie, but as they fail to do so and the contradictions heighten further, the petit bourgeoisie (which has no independent destiny) gets armed and organized under the supervision of the bourgeoisie to put an end to the proletarian agitation. That’s who the soldiers of fascism are, petit bougs who go into the street to put down the proles, typically working hand in hand with the armed bodies of the state. It’s a form of false consciousness whereby the “middle class” blames the proletarian hooligans for their problems instead of blaming the big bourgeoisie and sets out to eliminate them, beginning with whichever group is an easy scapegoat , Jews, communists, sexual minorities. Once this ideology takes state power (because the libs will hand the reins over to them, however uncouth they are, to do away with the threat of real proletarian uprising) they continue this madness of finding and eliminating scapegoats because without a willingness to end the real problem (private property relations) that’s all they can do to keep the whole thing going a bit longer.