You trying to dismantle my response to that comment is a round about way of agreeing with the comment I am responding to.
Read the bottom of the meme. People writing text books have to make choices. Thinking you know better than a subject matter expert makes you the person the meme is complaining about.
Do you have any examples of history books that aren't "American propagandists" creating curriculums?
Not covering the history of Sudan in an American elementary school textbook is not a propagandizing.
Choices must be made.