So does the American flag for a lot of people, that's why we need a military, right? Did you know this woman was a veteran, by the way? She swore an oath to protect that flag, not the confederate flag. Try reconciling this in your mind, maybe you'll understand what's happened better.
I'm not justifying it, just giving context for why folks are alarmed, especially for people from other countries who don't necessarily have context for obscure US symbols.
And yes, the American flag is problematic in its own way.
