With that said, I have a hard time agreeing with the definition of stupidity put forth in the article, as far as I understand it. To me stupidity is that state of mind that one may find oneself in before the first cup of coffee in the morning, or when stress (or ignorance) prevents one from intelligently considering all the relevant facts in a case etc. It is not something I would assign as attributes of persons lest it be someone I really didn't like, or (shudder) groups of persons, nor qualitatively separate from "dumbness".
Sticking to an outdated military tactic has far more reasons than one persons "stupidity", and what's up with mentioning South Africa in the context of "a kind of misguided innovation" influenced by "ideas and terms taken from the United States"?
Looks to me like the author is attempting to accrue academic points on the topic of stupidity, in order to use the insult more effectively against opponents.