Washington Post had an article that briefly spoke about this question. I wanted to know if there was any validity to this.

From Washington Post

But what is less well-known is the actual history of these symbols after the Civil War — and this history sheds important light on the debate. Confederate symbols have not always been a part of American or Southern life. They largely disappeared after the Civil War. And when they reappeared, it was not because of a newfound appreciation of Southern history.

Instead, as we argue in a newly published article, white Southerners reintroduced these symbols as a means of resisting the Civil Rights movement.