We have almost lost the chance now to hear personal testimony of WWII. I've met several Battle of Britain pilots too, but the last died in Dublin recently:
https://www.rte.ie/news/ireland/2025/0318/1502596-hemingway/
I do gather that some parents are rather sanctimonious and scandalized about their children learning anything but the most sanitized version of history. That seems so far to be the most presence in banning anything. Witness Harry Potter being listed as one of the most challenged book at the height of popularity.
History as it was taught in my grade school years certainly wasn't whitewashed and they are rather explicit about some of the horror. Moreover, the problem is that history wasn't taught well and made 'boring'.
This. 100% this. At school we got an extremely biased view of history, but even then it was taught soooo badly.
History (regardless of viewpoint, correctness, or accuracy) could be an enormously exciting topic. It's full of things that would appeal to any child when presented well.
But school history curricula for me was full of meaningless names, dates, actions - endlessly repeated with no enthusiasm at all.
By way of example, "the founding fathers were Christians" is a classic oft-repeated phrase I continually hear, to which I love talking about Thomas Paine, Thomas Jefferson, and Benjamin Franklin, all of whom were clearly agnostic (at the time, they were "Deist" which was essentially equivalent to "agnostic" nowadays). Thomas Paine's phenomenal book "The Age of Reason" was utterly mind-blowing and extremely radical at the time, receiving widespread banning and igniting firestorms in the culture. It's still a great read today! Especially fascinating when you consider this was many decades before Darwin would provide one of the most important scientific explanations that massively shrunk the area for God of the Gaps.
Some examples of the discomfort: to many white people now the history of slavery and racism is deeply uncomfortable. It's not even difficult to find hard evidence of such as many racist attitudes persisted well into the era of recordings and have been immortalized in movies and TV shows. I suspect a big part of that is the recency effect since we're still living with many follow-on effects of the practice even if we don't practice it actively anymore.
Much less talked about though is the history of racism and slavery among nearly all people at different times. For example a large majority of the black slaves that were sold to Europeans (including the Europeans living in the Americas) were originally enslaved by other black Africans and sold to the slave traders. Not all the slaves were sold either. To be fair the Spanish (at least in first half of the new world exploration) didn't have much of a problem doing the enslaving themselves as they routinely enslaved native people's after conquering them. We can also go back millenia and see the same behavior. Greeks, Romans, Persians, pretty much everybody had their slaves for as far back as history is recorded (and surely much, much farther).
We like to think we are enlightened nowadays, but I think history really demonstrates that as humans we are almost universally inclined toward enslaving other humans. Hopefully we're irreversibly past that now and well on our path to the Star Trek society, but even if that is the case it doesn't make the history any more comfortable.