I think we are in agreement, though we are speaking of two slightly different types of "authoritarian mindsets".
I think you are speaking of those who wish to become part of an authoritarian elite.
I'm speaking of the mob members who simply agree with certain absolutist and easily manipulated notions. (Like: "Hate speech is violence", or "we should never question someones claim of being emotionally hurt"). Simply believing in these notions make prone to mob aggression in support of authoritarianism.