In their declarations of secession from the Union, just before the civil war, some Southern states expressly mentioned slavery as a reason for their departure.
"An increasing hostility on the part of the non-slaveholding States to the institution of slavery, has led to a disregard of their obligations ..." South Carolina wrote in its declaration.
The state of Mississippi aligned itself with slavery right off the top ofits declaration
"Our position is thoroughly identified with the institution of slavery the greatest material interest of the world."
Georgia named slavery in the second sentence of its declaration. The sad list goes on.
To put it bluntly, South Carolina and the rest of the South only seceded to preserve the violent domination and enslavement of black people, and the Confederate flag only exists because of that secession.
Oppression, slavery, and wickness. This is what the confederate flag has always stood for, what it represents, and what it commemorates. It's a shame that it took reports of mass murderer Dylan Roof having been inspired by the confederate flag for southern states to recognize that it is representative of the darkest time in American history.