I had planned to NOT TOUCH this negative post, but the above quote gave an opportunity to dispel the frequent generalizations, painting every scene with dark motives, and every person as evil. History CAN be the telling of imperfect people doing good things.
For example, as told in my Civil War book Trapped in the Crossfire, an event coming after Atlanta fell to the Union, when General Hood ordered the Army of Tennessee to Dalton, where they captured a black regiment 1000 strong. Hood gave the order "No quarter!", and the men refused to shoot down unarmed prisoners, forcing him to change his orders. This event is revealed in the diaries of the men in the 35th Alabama Regiment who, at that time, served in the Consolidated Regiment.
In addition, to answer a question in the above last paragraph, history can be told revealing the negative of ancestors... if they are honest writers and historians. Again, in my book Trapped in the Crossfire, based upon my ancestors' CW experiences, I reveal as much truth as I can glean, and that which I don't know for certain, I speculate. All humans of all color, class or creed are flawed in character. To believe, or portray, otherwise is not being honest.