One can argue this, but they would be incorrect.

Bolshevism and Fascism were both about hyper centralized governance. Essentially they were an extension of European monarchy.

Free markets (“unfettered rabid capitalism”) is about decentralization of power on to individuals (market participants). It’s the opposite of centralized governance, it’s the lack of governance.

Facists like Hitler and Mussolini were not the outcome of “unfettered capitalism.” If they were, both would have come to power by being wealthy industrialists. Neither did, and the fascist movement was only supported by certain industrialists at the time in the pragmatic sense (turns out if the fascist guy in power likes you, he’ll let you keep selling your stuff).