Because the Confederate flag is not a racist symbol and the American civil war was not about slavery.

The Confederate flag represents pride in southern United States heritage (a large portion of which is black).

There isn't a nice tidy bow-wrapped single cause of the war. But if I were to try to summarize it in as few words as possible, it came from rising tensions between Southern States advocating for individual states rights whereas northern states continued to push federal laws that greatly benefited northern states' economies while stifling the south.

The south didn't leave and one day saying "fine, we'll go make our own country!" Individual states left the union one by one. The union refused to legally recognize secession. It wasn't all that much different than when the union declared Independence from England. The biggest difference being that they won.

The Confederacy formed in response to the actions of the Union. The Union would not allow individual states to given themselves, and individually the southern states stood no chance in open conflict against such a large convinced northern force.

Slavery was already on its way out before the civil war began. There had been efforts to make it illegal from the very founding of the country, by founding fathers, no less. Abolition was used as a means of obscuring the motivations of fellow countrymen and turning the public image into a vilification. And, as they say, the history books are written by the winners.

Because the Confederate flag is not a racist symbol and the American civil war was not about slavery.

The Confederate flag represents pride in southern United States heritage (a large portion of which is black).

There isn't a nice tidy bow-wrapped single cause of the war. But if I were to try to summarize it in as free words as possible, it came from rising tensions between Southern States advocating for individual states rights whereas northern states continued to push federal laws that greatly benefited northern states' economies while stifling the south.

The south didn't leave and one day saying "fine, we'll go make our own country!" Individual states left the union one by one. The union refused to legally recognize secession. It wasn't all that much different than when the union declared Independence from England. The biggest difference being that they won.

The Confederacy formed in response to the actions of the Union. The Union would not allow individual states to given themselves, and individually the southern states stood no chance in open conflict against such a large convinced northern force.

Slavery was already on its way out before the civil war began. There had been efforts to make it illegal from the very fonding of the country, by founding fathers, no less. Abolition was used as a means of obscuring the motivations of feels countrymen and turning the public image into a vilification. And, as they say, the history books are written by the winners.