The fact that Lincoln didn’t want to end slavery shows just how stupid nineteenth century Southrons were.
To the contrary, it shows how dishonest the Northern history revisionists have been. The South had very good reasons for wanting to leave. The North, specifically New York, was siphoning off 40% of all the revenue the South earned by shipping their products to Europe.
In addition to that, the Union was maintaining artificially high prices for products manufactured in the North which were to be sold to the South.
Simply by leaving the Union, the South would have seen a massive growth in it's economic enrichment, and newly capitalized industries would have then competed directly with Northern Industries, and likely put them out of business.
The real reason for the war is the Power Barons of Northern industry had enough influence in the Lincoln government so that they could use the government to prevent the losses of money they would have suffered had the South been allowed to become independent and set up competing industries.
You may not understand this, but 3/4ths of the Money created by European trade were from Southern origin products.
Southern independence represented a horrible financial loss for the titans of Northern industry, and most especially for those in New York. Had the South been able to maintain independence, Charleston South Carolina would have become the financial center of this continent, instead of New York.
New York became wealthy primarily as a result of US governmental policies which favored it. Without the government enforcing those policies, Charleston would have became what New York is now. A center of wealth and power.