Winner Bobbartthebuilderboi!
Why: The Confederacy waged a traitorous war against the United States. Flying the rebel flag is literally flying an enemy flag.
Why 2: "God Bless" is not a religious term used by clergy alone. It is not a "sacred ritual", it is a blessing like after a sneeze. Anyone can say "God Bless", it is well wishing.
Bob accurately identifies that supporting the Confederacy, is being against the United States.