There's been a lot of ink spilled over this, and you are only correct here in some respects. It was genuinely revolutionary at some periods of time, and genuinely serving to preserve the status quo for in others. The Italian fascios formed just after the First World War, Primo de Rivera's FE de las JONS (before the FET y de las JONS/Francoist merger), sections of Röhm's Brownshirts prior to Kolibri, etc. all borrowed significantly from communist revolutionary praxis and rhetoric. These groups sought a radical restructuring of society in their nationalist/harmonious/Völkisch vision that would include the toppling of traditional elites. The problem is that fascism is extremely pliable, and Mussolini's movement for instance underwent multiple different stages of development over its lifetime. Italian fascism looked radically different from 1926 to 1936 and from 1936 to 1944... From what we saw play out in history, the fascists distinguished themselves from similar radical groups by their adaptability to power and their usefulness to ruling elites. Italian fascists got their "in" by acting as strikebreakers and hired thugs for rural landowners and industrialists. The powers that be then deemed the March on Rome as acceptable to stave off a revolution. Italian fascism then adopted a far more amenable "corporatism" that suited its cooperation with King and Business. This collapsed when they defected in 1943, and the Social Republic once again adopted a revolutionary praxis and rhetoric because it was backed solely by German power. In the case of Germany, the Nazis had to purge their vanguardist wing with Kolibri because it was inconvenient with their business/establishment alliance. This cooperation with the German ruling class continued on until the aims of wartime Germany began to fray and the war turned against them, but by that time the two were inextricably linked so there wasn't really much the latter could do without threatening its own interests. In Spain, we can see a similar case with Franco acting as a paternal unifier between the traditional centers of reaction in Spain (Carlists, CEDA, and sections of the military elite that supported the old Primo de Rivera regime) and the formerly revolutionary fascists of the FE de las JONS. Franco merged the FE de las JONS with the reactionaries and managed to weld it into a broad front of right wing groups to form a state party FET y de las JONS which essentially was only pseudo-fascist/had the trappings of fascism but was in character staunchly reactionary.
I agree with you that fascism possessed some revolutionary character, but that is only part of the story and that is the part of the story before power in most cases. The user you are replying to is mostly correct in stating that the fascism we know from history became a force to be reckoned with only because of its abandonment of revolutionary praxis and it offering its services to traditional societal elites and thereby finding a way to power.