"Yes, it is true that in a finite school year, say, with finite class time and books of finite heft, not everything about everyone can be taught. There are necessary trade-offs. But in practice, recognizing the true and longstanding diversity of American identity is not an either-or. Learning about the internment of Japanese Americans does not block out knowledge of D-Day or Midway. It is additive. It brings more complexity and fosters a more world-ready awareness of complexity."
Eric Lieu in a 2015 Atlantic article revisits E. D. Hirsch, Jr.'s Cultural Literacy.