No, that's not my point at all.

Saying the Civil War was fought over slavery is about as accurate as saying WWII was fought over the Jews. It's an explanation suitable for a 6 year old, but like all things in politics the situation was much more complex.

How can a war be fought just over slavery when slave-owning states fought on both sides? How can a war be fought over something which was not illegal at a federal level? Slavery was clearly under the jurisdiction of the states until after the war, and the South did not seceed because they wished to be slave states -- THEY ALREADY WERE. How can we canonize the North over their stance on black people, when the North refused to recognize them as citizens and upheld property rights against them by returning them to their owners? Ironically, it was the South who was pushing for voting rights for the slaves prior to the outbreak of the war, and the North fought against it. (Although, presumably, it was as long as the slaves voted the way they were told to.)

Simplistic statements like insisting the war was entirely about black freedom serve to demonize the southern states and deflect blame. Slavery was an American problem, not a Southern one, but by blindly assuming that slavery was only issue in the south, the rest of the US can pretend they have clean hands. The truth is much sadder.

Today, racism is an American problem, not a southern one. By demonizing the south, the rest of the country can go about ignoring their problem and blaming it on those "backward southerners." Racism only exists in the south, right?

Perpetuating the myth that the North was somehow on a crusade to help the black people during the Civil War is part of that demonization and ignorance.