I have a feeling that Libertarianism was very different in 1989 compared to today
For example this article by Peter Schwartz from 1989 from the Intellectual Activist Inc (Objectivist writings):
“And since reality is the fundamental “restraint” upon men’s actions, it is nihilism—the desire to obliterate reality—that is the very essence of Libertarianism. If the Libertarian movement were ever to come to power, widespread death would be the consequence.”
“Libertarians will readily listen to a talk on Objectivism and liberty—and the next day they will invite someone to speak on why the Bible is the only basis for liberty—and the next week they will hear someone argue why only skepticism and amoralism can validate liberty, etc. They lap this up. It is all entirely consistent with Libertarianism.”
“If an Objectivist wants to communicate something worthwhile to such people, there is one absolutely vital lesson they need to be taught and one indispensable method of teaching it. The lesson is that if they truly want a rational foundation for defining and defending liberty, they should renounce Libertarianism and its “tolerance,” and should instead adopt Objectivism, where there is no tolerance for the irrational. And an essential method of imparting this lesson is by not speaking to Libertarian groups—by demonstrating that Objectivism consistently refuses to cooperate with and to sanction its antithesis—by showing, in other words, that we practice what we preach.”
(Source: aynrand.org)