Libertarianism, Collectivism, Collective Identities

Embracing some kind of collective identity does not necessarily make one a collectivist. It does, however, make one a collectivist if the identity in question is not voluntarily and unanimously accepted by of all its supposed bearers. Professional or religious identities usually enjoy such acceptance. National identities practically never do. That is why "a libertarian think-tank" or "libertarian Christianity" are perfectly reasonable labels, but "libertarian nationalism" is a contradiction in terms.