They weren't traitors. If you believe this, then you must have been taught this. And you were taught wrong. Perhaps your history books were already cleansed to fit a mantra that was more to the likings of some. But that doesn't make it correct. They believed they were fighting for State's Rights as written by the founding fathers. You can't be so naive to believe the entire south fought to keep their slaves. 95% of those that fought had no slaves, owned no slaves. They fought because they believed their Federal Government was getting too big and making decisions they had no right to do. They wished to secede. Lincoln did not want this. He needed and wanted the resources of the south. A few facts... that your history classes left out.
Robert E. Lee was married to George Washington's grand daughter. BTW, Washington had slaves as well. So did Grant. Lee was also requested to lead the Northern Army by Lincoln but his heart & life was with the South. Another tidbit... Today's Arlington Cemetery was part of Lee's estate. He served his country before and AFTER the Civil War. Calling Lee a traitor is like calling Lincoln a traitor to the US Constitution.
Are you wanting all things George Washington, Jefferson and Grant removed as well?