And how exactly did the federal government and the Supreme Court violate state's rights?
Learned articles have been written on how the propaganda of the Abolitionists attacked and dissolved the bonds of fellow-citizenship. It is an area of study all its own. There are certain things that, when they have been said, cannot be unsaid. It's true in politics, too: "Rum, ruin, and Romanism." "Read my lips." And so on.
It does not only affect the states of the Confederacy, but it affects every state and every resident of the United States.
I have argued myself that the Plains States lost the Civil War just as finally as the South. That their regiments fought on the wrong side, in a triumph of propaganda and perversity, over the innocent and honest intentions of their own farmer-soldiers and farmer-citizens. Their political leadership should have kept them out of it, but the freesoil interest held them, the fear of economic competition from black slaves spurred them to make war on their own freedom and dignity and to record an immense, dark victory for the excrudescent forces of oligarchy, inequality, plutocracy, and the politics of backstairs private influence, indirection, mass propaganda, and cynical dissimulation.
We no longer have a federal constitution but a national constitution. We have today what the Founders of this nation blatantly opposed.
All but one. Hamilton and his business-class adherents were all for it -- an empire without a king, a republic of the Interests, Venice reimagined and grown great on the sweat of its peasants and coolies. Their vision is now complicated and darkened further by the presence of a vast and murderous neo-Marxist, neo-Stalinist cabal whose zombie cadres feed on the successes of the oligarchs. The People struggle with both factions, but it appears so far to be an unequal fight, the moreso because their mortal enemies control their sources of information and the education of their children. Mass media hebetate the citizen-host with vapid entertainments (Seinfeld e.g., a show explicitly constructed on nullities both abstract and animate ..... "not that there's anything wrong with that") and ply them with fire-hose streams of factional and interest-group propaganda and commercial messages.
A citizen of Jacksonian America once upbraided Tennessee Congressman Davy Crockett for spending public money on a private charity. Today that citizen is "Kramer". Need I say more?
Without slavery there would have been no United States, no Constitution and no Federal Government. Allowing slavery was a price the country paid to achieve success in the Revolutionary War and Founding.
It was recognized at the time as a major problem, and the best minds of that brilliant age wrestled with it. For example, Thomas Jefferson figured out how much it would cost the Federal Government to purchase freedom for every slave -- far less in blood and treasure than the Civil War cost. And the son of Founder John Adams, John Quincy Adams, first figured that Constitutionally the only way short of Amendment to abolish slavery was a War of Southern Rebellion.
And those were the only real choices: 1) Amendment (impossible), 2) Purchase all slaves (too expensive, and how is that even Constitutional?), 3) A War of Southern Rebellion (painful but doable).