The logical fallacy was committed by you when you equivocated with zero support, Communism and “The Free Market.” The free market has never existed except as a thought experiment so that market economists can try to model what effects supply and demand would have on a frictionless market. It’s equivalent to physics classes where you ignore air-resistance and friction. No one claims physics is a fairy-tale and it would be absurd to claim that market economics and physics are both fairy-tales for “exactly the same reason.”

Communism on the other hand is a well-defined and studied economic system, and aspects of that economic system exist in every country on earth.