[m00g00]

Libertarians support open borders as a means to free movement of labor. As you alluded to, they also do not believe in taxpayer funded social services, much less granting rights of citizenship to not-naturalized immigrants.

This combination of ideas is not at all what is being espoused in liberal universities. They are pushing for both open borders (or at least amnesty and much less restrictive immigration laws) and guaranteed social services for immigrants.

Libertarians certainly don't view nations as "completely artificial illegitimate social construct" and I seriously doubt most college professors are teaching from that ideology's point of view. Libertarians are often as demonized as Republicans at universities.