Fascist libertarians

Crooked Timber links to and samples from a couple of Corey Robin posts on Hayek's support for Pinochet and other un-democratic preferences. He didn't support apartheid per se, but thought South Africa was being unfairly punished, and that boycotts and embargoes could lead to "wholesale destruction of international
economic order". He defended Portugal's dictator Salazar as well, while von Mises defended Fascism as saving civilization.

Then of course there's Hans Hermann-Hoppe, monarchist apologist, but to be fair he's cited by libertarians far less than Hayek or Mises.