In the early 1980s, when Joel Garreau wrote “The Nine Nations of North America,” which organized the cultures of the USA and Canada into separate “nations,” he included the part of Illinois south of Springfield in the Southern nation, “Dixie.” Therefore a Confederate flag at this concert should be all right, even though Illinois was on the other side in the Civil War.
Visited Muddy lately?
IL had lots of confederate sympathizers during the civil war.