Well, again. A sidestep. Answering "We consider some symbols offensive because of what they represent and we denounce the deeds that were done in their name" would wrap this up, and you and Tambora both realize that. All you're stuck with now is arguing that somehow, someway, the rebel flag's imagery is unique and falls into a morally neutral category that defies effective or worthwhile criticism--which is a conceit that defies facts, history, and common sense. This isn't a discussion about whether some philistine should have the "right" to tattoo a swastika on his arm or fly the rebel flag on his porch. This is a discussion about what message is being conveyed and received with such symbols.
Its not a sidestep at all, i support other people to have different meanings for different things, and you support telling others what they should believe based on how you see things.