Some parts of the middle east are a living confederacy right now. There are segregation signs in some shops in china (plus enslavement of poor/woman) and invisible segregation by race in south American politics. People learn about history, people try to avoid repetition of that history and the flag is mostly a symbol against the reintroduction of "caste" in the US. Nazi like shit heads are pretty universal and the US is shining beacon for those escaping these circumstances.
"US always evil exceptionalism"is a plague among the authoritarian left.
No: the confederate flag is mostly flown by nice well learned history enthusiasts who simply couldn’t bear to see their fellow man of any ethnicity placed in any form of hierarchy or chains, and so display it to show everyone how glad they are that the confederates where defeated.
“US is always number one and everything is just perfect” is a plague among the uneducated right. There is nuance to everything, unfortunately.
People still fly the confederate flag.