2. The US flag is a flag of treason, I agree. The focus is on the Confederate flag because I wanted to talk about its relation to the United States specifically.
3. There's definitely a case for claiming that secession was legitimate, I agree.
4. I disagree that the movement wasn't treasonous. I've articulated my position too much to re-post it. But Texas v. White and Williams v. Bruffy explain my position quite well.