I believe the issue was my asking about the lost cause mythology.
What I have learned, though (from here and elsewhere), is that there was a dark and sinister conspiracy orchestrated by ex-Confederates (e.g., Pollard) tto "highjack" the history of the war and its causes. They created the myth that the South fought for noble causes (eg, self-government, to maintain the principle of states rights against overarching federal power, free trade, a traditional social order). The truth, of course, is that the South fought to preserve a brutal social order built on the vicious exploitation of African Americans.
Nevertheless, the dastardly Southerners were, somehow or another, wildly successful in this program of mythopoesis; the U.S. was helpless to prevent its dissemination. The South, thus, won the peace, and the myth held sway over all.
However, in the last seven or eight years, there has been a general awakening and re-valuation (because every generation needs to define the truth for itself). And we now understand that the Confederacy should not be honored, nor its soldiers memorialized; its symbols should be eradicated, and the mythology must be purged from the body politic and perish from the earth.
Forrest is, of course, part and parcel of the mythology; indeed, something of an exemplar, in that a brutal slave trader and a crude, illiterate border ruffian was mythologized into a military genius.