And what do you think the Constitution represents? A mere set of words on a piece of paper?
Lee WAS a traitor. He took up arms against his own country and it’s duly elected government.
The old nation should have left them alone.
The United States was not his country when he took up arms against it. He resigned his commission in the U.S. Army when Virginia seceded and joined the Confederate States of America. He fought for the CSA and defended his home state, Virginia, from an invading army.
I respect the fact that you disagree on these points. I believe today, as Lee and others believed then, that secession is a legitimate response when the Federal Government abandons the Constitution. The states have no will to attempt that kind of action today, even though the Federal Government today has gone so much farther in its overreach than it had in 1861.