After the Civil War, the Confederate Battle Flag become followed by several corporations, including the Ku Klux Klan

https://johnathanldou338.opalvector.com/posts/understanding-the-symbolism-of-the-confederate-battle-flag

After the Civil War, the Confederate Battle Flag used to be followed with the aid of various companies, together with the Ku Klux Klan, which changed its meaning into one associated with racism and segregation.