"The postwar roots of the term libertarian are indisputable: it was a synonym for a word that had been stolen from that generation by the New Dealers. That word was liberalism ..."https://www.aier.org/article/if-libertarianism-hollowed-out-why/ …
That's a category error. Communism's exoteric story was based on a falsehood but it shared an esoteric story with liberalism so it converged in practice as it shed the artifacts of its discredited exoteric story about capitalists sucking up resources while producing no value.