Actions speak louder than words. Ayn Rand may have put on appearances of free-thinking and libertarianism, but the "cult" she organized around her was authoritarian and relied heavily on group think (insofar as, you were OUT if you didn't tow the randian line).
It's not really authoritarianism if you just don't want to associate with people you don't have much in common with. For example, the group of friends I hang out with doesn't include white supremacists or religious nutcases.