@engineer,
Sorry however if someday in the far far future some government or group improperly used the current US flag to support some god awful movement that does not mean that the flag is now in disgrace for forever and a day.
Neither you or the small KKK movement or anyone else for that matter can wiped out the river of blood of southern soldiers fighting bravely for their homes.
Footnote very very few of those soldiers had anything to do with slavery.