First of all, your “collective terrorism” was legal at the time, second, it was the first Republican that campaigned to change that law, and thirdly, the South was NOT fighting for slavery, but because the North was fighting them! Many scholars now agree that the South was within their rights to withdraw from a union they voluntarily joined, but the North could not live without the tariffs and taxes brought in by the South. It was only near the end of the war when slavery was brought up by the North to help raise an army in New York. However, the South does honor those who fought and died all over the South. Only one battle was fought in the North - Gettysburg.
I believe you’ll find that the “monument to domestic terrorism” refers to the KKK. Stone Mountain was the site of the Satanic ritual that was the rebirth of the Klan.
On November 25 of the same year, Thanksgiving Day, a small group, including fifteen robed and hooded “charter members” of the new organization, met at the summit of Stone Mountain to create a new iteration of the Klan. They were led by William J. Simmons, and included two elderly members of the original Klan. As part of their ceremony, they set up on the summit an altar covered with a flag, opened a Bible, and burned a 16-foot cross.
Fundraising for the monument resumed in 1923. In October of that year, Venable granted the Klan easement with perpetual right to hold celebrations as they desired. The influence of the UDC continued, in support of Mrs. Plane’s vision of a carving explicitly for the purpose of creating a Confederate memorial. She suggested in a letter to the first sculptor, Gutzon Borglum:
“I feel it is due to the Klan[,] which saved us from Negro dominations [sic] and carpetbag rule, that it be immortalized on Stone Mountain. Why not represent a small group of them in their nightly uniform approaching in the distance?”
Stone Mountain park officially opened on April 14, 1965 — 100 years to the day after Lincoln’s assassination.
The bloodiest day in US history was fought in Maryland, which remained in the Union.