The Klan held great sway with key Georgia politicians, and its Georgia chapters included many policemen and sheriff's deputies.
"You couldn't pick a worse place to put a mine," said Josh Marks, a conservation organizer for the Georgia chapter of the Sierra Club.
Gerry Weber, legal director of the A.C.L.U.'s Georgia chapter, filed the suit.
A Georgia chapter of the Sons of the American Revolution is named after him as well.
The Georgia chapter of the Public Relations Society of America's annual award for volunteer service in named in his honor.
"The whole thing turns my stomach," said Vicki McLennan, president of the Georgia chapter of the National Organization for Women.
"You can't imagine the anger," said Dan Coleman, spokesman for the Georgia chapter of the Sons of Confederate Veterans.
On Wednesday, a parent and the Georgia chapter of the American Civil Liberties Union filed a lawsuit demanding that the disclaimers be removed.
Later, the couple helped found the Georgia chapter of the A.C.L.U.
As a member of the Georgia chapter of the survivors association, he planned to meetsome Japanese pilots who took part in the attack.