(sigh)
Why do you insist on arguing this with a black and white perspective?
It's so easy TODAY, for you to point fingers at one segment of time, and shoot it forward to 160 years later, and expect the same arguments.
The U.S. should have destroyed and banned the flag at the end of the war, BUT they didn't. It's now viewed different by a LOT of people that see it differently TODAY.
You on the other hand want to continue to fight this argument, using 1860's logic.
Yes, there are people today that are triggered by it, maybe because their great great great grandparents were slaves, or slave owners, so they see the flag differently than someone who merely lives in the region today, and loves their region of the country.
My advice, is that the flag is a lost cause, and TODAY there are no upstanding corporations, enterprises, and what not, that are going to want to associate themselves in any way with the flag, because the narrative that the flag represents slavery, or anti-black, has won the day.