It's part of their modern agenda of total socialism. Without going to deep into it (right now), they have demonized the South and all it was and stood for because the South dared to show Americans they don't have to endure an oppressive federal government. "States Rights" is protected by the 10th Amendment. So, the progressives linked that to slavery, etc.. So, now 150 years later if you invoke "States Rights" you'll be accused of wanting slavery back too.
It's more complicated than that, but that's the gist of it.
I remind my Yankee friends they lost 400,000 young men fighting to keep the South apart of the US. We lost 250,000 trying to leave....what's that tell ya? Would we fight to keep damn Yankees? Nope! we'll help them pack and show them the way out!
"It's the land, Scarlet." It's a Scotch-Irish thing too.
And, to be fair, there were individuals and some states that did in fact claim slavery as part (but not all) of the reasons. Of course, at NO TIME was any slaving ship allowed to dock at any port in the Southern States.
When defending the honor of our ancestors we have to be careful not to excuse their faults.
"Slavery is like holding a wolf by its ears. You don't like it, but you don't dare let it go." - Thomas Jefferson
The Founding Fathers recognized slavery for what it is: wrong, morally. But, they could not see a way to operate huge ag-based holdings with a profit w/o the so-called "free labor." As much as I admire our brilliant Founding Fathers, especially Mr. Jefferson, they were wrong on this matter.
First, slavery is anything but "free" labor. It is very expensive, and very inefficient. Slavery is akin to totalitarianism, such as socialism/communism, where the needs of individuals are totally disregarded in exchange for the "greater good." Like in socialist societies today, the "worker" is disincentived to excel, since his/her prospects are pre-determined and capped. The slave lived in the ultimate version of that failed system. He had only to do "enough" to get by. Hardly a system that encourages innovation, and "going that extra mile" by the labor force. From an economic point-of-view slavery is stupid, and counter-productive to good capitalism.
Many Southern "Planters" learned this truism after the War of Northern Aggression. Before it took 300 slaves to operate a plantation, afterwards, the "workers" were employees, and sharecroppers, and had a rooting interest in the success of the plantation. Now with an average of 75 "workers" that same plantation became 10X more profitable. We see that most prevalently in areas like Central and North Louisiana where the great Southern Plantations escaped (mostly) the destruction of invading Yankee hordes, and the carpetbaggers, and remained in the same family's hands. The single best example of this is the Elvira Plantation just north of Alexandria, owned by the Shaw family.
Slavery is stupid, immoral, counter-productive....and is akin to big, intrusive government pigs forcing people into pre-determined tracts, designed to make them "slaves" to the state and keep them loyal.
Bill, I say this all the time to anyone casting a 21st century judgment on an 18th and 19th century society. We need to be VERY careful being so self-righteous.
Here we are, so advanced as a culture...casting judgment on them, all the while we're legalizing such things as abortion rights and same-sex marriage. Add to that, the fact that just as the Confederate flag has been mostly retired, pulled, relegated to museums because it has made a segment of the population uncomfortable...always know...it's never enough. Now the U.S. flag is being challenged at places like UC-Irvine because it's "oppressive" --- hold on, the battle's only going to continue.
It upsets me deeply that the hypocrisy that Liberal Progressives uses to justify their actions. The demonize the South over a flag all the while enslaving the African American community with the government welfare programs, failed school systems, faulty logic and out right lies. I'm am a full on Constitutionalist who believes it is the right of the state to determine all laws not regulated by the Bill of Rights. New York liberals have no right to tell Louisiana Citizens what to do. I have no interest in their affairs why should they have any in mine. We as a people have allowed the government to grow so large that is looms in our everyday life like a prison guard hell bent to determine our smallest of actions. That's why I stand by that old rebel flag. Because it stands for the rights that were long ago taken away from me.