Are you making jokes?
I’m not American, I’m Albertan, and even we know it was about consolidating power in DC. Slavery wasn’t even brought up until later in the war when Lincoln needed public support to raise more funds.
The only people that think it was about slavery are even SJW types. I don’t think you’re in that category.
I suggest you look at the writings of the Southern leaders of the time.
First, was it a rebellion? "I hope therefore, that all constitutional means will be exhausted before there is a recourse to force. Secession is nothing but revolution. The framers of our Constitution never exhausted so much labor, wisdom and forbearance in its formation, and surrounded it with so many guards and securities, if it was intended to be broken by every member of the Confederacy at will. It was intended for 'perpetual union' so expressed in the preamble,49 and for the establishment of a government, not a compact, which can only be dissolved by revolution, or the consent of all the people in convention assembled. It is idle to talk of secession." - Robert Lee, January 1861
Was it about slavery? "The South had always been solid for slavery and when the quarrel about it resulted in a conflict of arms, those who had approved the policy of disunion took the pro-slavery side. It was perfectly logical to fight for slavery, if it was right to own slaves." - John S. Mosby, "Mosby's Memoirs", p. 20