If you seriously think that someone flying a Confederate flag means they’re a white supremacist, then you’ve lost the plot, dude. You can call them ignorant I guess, but if you go up to pretty much anybody flying a Confederate flag and ask them if they’re a white supremacist, the vast majority of the time they are going to answer “no” or “Bless your heart”.
“The Democrat party hasn't supported white supremacy in decades”
The fact that they won’t stfu about white privilege suggests otherwise.
“I've never seen anybody do that with Biden flags.”
Like I said, nobody supports Biden. The only reason people voted for him is because so many people had hate boners for Trump that they would literally have voted for a turd sandwich if that was the option provided.