Oh please, every textbook is organized perfectly according to a Marxist worldview.
They fundamentally see every event as a struggle of oppressed vs. oppressor, where every action or institution is an attempt to maintain power or put folks down, and all the most salient historical events revolve around these developments.
Even on the AP US History test, you can get a perfect score without knowing any US presidents, wars, or anything else. But, if you know about the development of feminism, unionization, gay rights, reconstruction, segregation, and civil rights, you can get a perfect score.
CRT and social Marxism more broadly has already won so thoroughly that everyone has swallowed every tenet of it without even knowing where it came from.
That's why I've asked any of you to name an institution or social structure that isn't racist.
You can't name one. Therefore, you have already swallowed CRT plank number 1. Then, I'd move on to number 2. And 3. You've all swallowed all of them.