Ah, but they can fly their state flag ...
Georgia did away with the "battle flag" part of their state flag several years ago, but Mississippi is still holding out. Their governor recently said that it was up to the people to decide if it should be changed and wants a referendum on it.
Whites still outnumber blacks in Mississippi and no one knows how a potential vote might go.
They only added the "battle flag" to their state flag in 1894 during the height of the "Lost Cause" movement and as a slap in the face to those who were for equal rights. It was done for very racist reasons and everyone can agree to on that fact.