I wouldn't place too much faith in school texts. Their indoctrination of the youth is what is keeping the left alive, in large part. Thankfully, the youth are too busy being young to vote. And of those that do, many more are coming over to our side....
Just as we study the dangers of communism, the dangers of political correctness (especially in news room "style guides") needs to be taught to young students.
Not to over throw the media (they are long in decline) but to make sure it never happens again ("The most trusted man in America..." my ass).