Our Mississippi was the main history textbook used by Mississippi public schools during the 1950s and 1960s. I encountered this book a number of years ago while working on my thesis and had forgotten all about it. While doing lecture prep today I discovered it again. Here’s what Mississippi high schoolers in the civil rights era were learning about the Ku Klux Klan:
In 1866, a secret organization, the Ku Klux Klan, was founded in Tennessee. It quickly spread throughout the South. The purpose of the Klan was the protection of weak, innocent, and defenseless people, especially the widows and orphans of the Confederate soldiers. Besides this worthy aim, the Klan had another purpose – that of restoring the political power in the South to the educated and responsible white men who formerly had held it…The Ku Klux Klan did its work effectively and well. One after another, unfit and corrupt people were removed from office. Not only the Negroes but also the carpetbaggers and scalawags were visited, and little by little these people became afraid to use their influence.”
People nurtured on these stories would find it very difficult to act humanely in the present. Folks, historiography matters a lot!
Colorblind Christians 
I may have shared this with you before, but I wrote a short blog post about my 4th grade history textbook in Virginia that may be of interest to you. It touches on the same themes as your post. See: http://fatchance.tumblr.com/post/4009099090/a-feeling-of-strong-affection-existed-between
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