Revisionism is about correcting misrepresentations and outright falsifications of history.
One way of falsifying history consists in presenting essentially identical facts differently. For example, what is reported as a war crime by an adversary is excused as a defensive measure when committed by the own troops.

One of the most obvious examples are the so-called "concentration camps", mostly presented as a German invention, conveniently forgetting that such camps were established by the democratic (and less democratic) luminaries before, during and after Nazism.

Revisionism is not about moral condemnation. Who in a war is innocent and who is not, is a difficult subject. If a total war justifies incarceration of innocents, is not a revisionist consideration.