The confederate flag is a flag from the south. It represents the 13 states in the south. The south had slaves but the north didn't
This is an opinion question and quite controversial even today. Do you feel the Confederate flag is a symbol of racism, bigotry, slavery, and everything that is wrong with the American South? On the other hand, one might view it as a historical symbol and testament to American Southern pride. It is really up to you.
This paper by a professor of political philosophy at Emory University provides a lot of contextual insight that helps answer the question:
https://mises-media.s3.amazonaws.com/16_2_4.pdf?file=1&type=document
