PS you're welcomeJust as Civil War history is mistaught in order to support the Identity Politics agenda of fomenting hatred of whites, the histories of the two world wars were fabricated in order to blame Germany, more about which later.
Oooh! The American Civil War! As if there'd never been any other, and forgetting the battles of the English Civil War were mirrored and echoed by fighting in its American colonies.
And as if us Canucks should care which version of the history one American is trying to foist on the rest of his fellow citizens. Wake me when he gets to his promised fables about the World Wars they tried to ignore as long as they could.
But if it's just another anti-progress, racist whine that only proves there's always another resentful self-anointed victim of the uncaring majority to be heard from, don't bother.
Like most of history it is more complex than it is made out to be, and that includes the comments by Paul C. Roberts, where he seemingly views causes of the war as an either or matter.
As to whether Canadians should care. It is interesting that although the Imperial Government mildly favored the Confederacy, Canadians quite clearly favored the Union, indeed a not insignificant number joined the Union Army.