It is NOT dishonest or untruthful Revisionism to say that the Civil War was about what the people who insisted on fighting it SAID it was about:

Unionism Vs. Confederacy (or the right to secede from the Union), and NOT really at all, except peripherally and somewhat incidentally, about Slavery.  (Item)  The Union Generals who swept like a refining fire through rural Georgia, destroying houses, barns, granaries and crops, said, for example, that that in itself was their purpose; NOT the freeing of slaves.  (Item)  The Union soldiers, who invaded the homeland and destroyed the property of their fellow citizens in the Southern States, called (those whom they thus made) their enemies "Seshes" ("Secessionists"), NOT "Slavers."  (Item) The fascist lunatic without whose obsessive determination to prosecute the war there would have BEEN no Civil War (no wonder he was depressed), Abraham Lincoln himself said it was about "preserving the Union" (whatever the hell that means), and NOT especially about slavery.  But of course Postmodernists never take anybody at their word.