Interesting bit of trivia: there was a question once asking if the early 20th century Nazis in Germany were also Grammar Nazis. (You know… well regimented, for sure also sticklers about grammar matters too.)
Turns out that the Nazis liked to lessen the activities of the “Grammar Nazis” of those days.
Other cites in that page pointed to how Hitler actually inherited a very conservative educational system, meaning that what the Nazis did was to get rid of the grammar Nazis and concentrate more in physical activities (meaning more future soldiers), those were more important for the Reich.
And even if the Germans noticed, they could not do much about the degradation of items like grammar.