Pure propaganda drivel.
The war was about slavery, and only slavery. The South knew it.
That’s why the Confederates put not one, not two, but THREE protections FOR slavery in their slimy anti-human constitution.
But keep lying to yourself.
Answer me one question.
What was “the North” so worried about with the expansion of slavery supposedly into new territories?
Honestly, what concerned them? Besides the fact several Yankee states still had some slaves, what were they worried about having more “slave” than “free” states/territories?
Can understand some in the “South” were worried about their slavery being voted out if territories became free.
But what was “the North” losing if they lost territories, rather than being free? What was the South going to impose on the North if they had more electoral and congress votes?
Or is that kind of like the mask hysteria now? Pro-mask sheep scared they can’t wear masks because there are no mask mandates? What is the fear?