How many other countries honor traitors who lost? Lee decided protecting Virginia and the institution of slavery was more important than protecting his country.
If Lee had accepted the offer to command the northern army, what exactly would he have been protecting the northern states from?
Do you enjoy your bloated, overreaching Federal government in DC? That’s exactly what Lee was fighting against. Slavery was a dying institution at the inception of the War of Northern Aggression and would have died of natural causes. Slavery has been extinct for almost two centuries and yet, the African American community continues to blame “slavery” as the cause for many of social and economic issues plaguing their community in the present day. Lee was an honorable man.
If Lincoln, Grant and others of that time did not consider Lee a traitor, who are you to say that he was?
The War Between the States/Civil War was part of American history.
All over the world, most countries have statues and monuments that tell the story of their history.
Conservatives still believe many of the things that Lee believed - the importance of one's home, the primacy of local government, over the rule of the central state. The rights of states over the central government. The behavior of a gentleman, particularly in war. Even his enemies understood Lee's cause, and recognized Lee as an honorable man. That attitude on both sides allowed a quick reunification of the country, and avoided Civil War 2, 3, or more, as most countries would experience.
Your thinking represents a very 20th century, totalitarian, total war concept. Unfortunately, that's where America's politics are today.