This really bothers me. Maybe I am just too literal. The North and the South was divided by Republicans and Democrats. The Civil War was fought over many issues, slavery being one of them but not the biggest one. The 10th Amendment and State's Rights was the big hot button issue at the time. Here's a few passages from a good article that I will link to:
"In the decades that had passed since the ratification of the Constitution slavery had been steadily abolished in the Northern states while remaining prevalent in the South. This inexorably led to the issue of slavery becoming intertwined in the issues of States Rights, Federalism and the growing power of the Federal Government.
The proponents of States rights appealed to the 10th Amendment which states, "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." This had been added to the original Constitution due to the intellectual and political pressure from the Anti-Federalists. This Amendment was meant to reassure people of the limited nature of the Federal government and that with the few exception specifically delegated to the Federal Government by the States the States and the people were free to continue exercising their sovereign powers.
President Lincoln did not see the Civil War as a war to end slavery until that became necessary to stop European powers from recognizing the South.
Lincoln said in his 1st Inaugural Address, "I have no purpose, directly or indirectly, to interfere with the institution of slavery in the States where it exists. I believe I have no lawful right to do so, and I have no inclination to do so."
https://freedomoutpost.com/civil-war-issue-states-rights/
This being said I am glad that America took the lead in abolishing slavery. No human being should ever be the property of another. But this is whole R's vs. D's bugs the shit out of me. There are good Democrats are more towards the middle and there are shit head neocon RINO Republicans who deserve to hang by the neck. Just don't want us to lose sight of the bigger picture.