The circular politcal model that places facism (authoritarianism) as an extension of conservatism in general has always been more flawed than the more logical conclusion of tolalitarianism as an extension of collectivism.
I'm not sure why this is other than the fact that well known authoritarians like Hitler, Franco and Pinochet all positioned themselves as a polar alternative to collectivism.
It is flawed though to be sure but I would never consider Hitler a collectivist.