It's incredibly dishonest to suggest that the demand for a non-whitewashed history is just some crackpot bullshit being done exclusively by Chinese nationalists. It's a widespread and very reasonable demand, and the idea that it has "nationalist" intent is itself a big bunch of propaganda by the west who doesn't want people investigating the validity of history.
It makes sense though; "history" in the west is nothing but pure propaganda. They lie to us and convince us that Columbus and Mother Theresa were good people, or that the US is founded on "freedom". We do need a non-western-centric history.