In this case, it's the author of the aforementioned book that's tried to rewrite history. As someone that lived someplace that Lewis and Clark spent time at, I remember when the book was published and the reception it got.
My intention was just to point out that the book has critiques.
As to your comment though, I was going to make a smart ass comment to match yours, but I'll just say, people get scared when their beliefs are challenged and it threatens the "safety" in those beliefs. They just can't handle it.