Perceptions on things change as time passes.
I had some African American Friends that proudly flew a Confederate flag.
Why? They told me they were proud of their Southern roots and heritage.
Things change. It's interesting how people change the meanings of things at times, and try to force others to say that it HAS to mean a specific thing.
Ironically, these days I suppose white people would call them racist for flying that flag. Others might as well. It didn't mean that to them though. Not how they explained it to me.
I do not know what their perception of the Confederacy was, or exactly their purposes in flying the flag, just what they told me. They had a Confederate flag license plate as well. Was it there way of proclaiming they were from Georgia and not From Florida or the North USA, or something else? I don't know, it's been a little while since I talked to them (life moves on, I move, they move, etc...etc...etc).
Today, I suppose with how we are supposed to think, we'd be forced to think the worst of them, even though they were African Americans from the US South. I have no idea what others thought of them in their hometown.
It just seems to me that at times, people react the way they feel they should react, or that they feel others should have reacted rather than what many people, some who do not fit the stereotype.
It's not always clear cut, right and wrong. I would argue that the Civil War ultimately was about Slavery, but ironically Slavery was never outlawed for the North (yes, there were slave states fighting on the North's side and while it got outlawed in the south by the Federal Government, it was NOT outlawed in the North until LATER with amendments to force the change, one could say it was even a particularly messy situation that propped up that the US has basically ignored in it's history books in trying to paint the South as the Slavers and the North as the Good guys...ignoring later conflicts in these same slave states in regards to getting the slavery out of them). Things tend to be more complex in actual history than simply black and white, and maybe it was this grey area where these neighbors of mine were at with their Flag and Southern heritage.
I have a feeling that the more current stereotypes rather than the more traditional values and ideas espoused by these neighbors are what have influenced this change in the DL books. Many seem to latch onto the modern telling of what the Confederacy was and what the Flag stood for rather than what some of those (even my neighbors, who seemed particularly proud of a Southern Heritage) seem to hold in the past.