Confederate flags do not inspire me. I don't want one about my house and they're too tied together with defence of slavery for me to honor them anywhere else. Despite having been born in New Orleans, I'm pretty much a Yankee in these matters.
I'm repeatedly told that I do not have standing to decide whether a school name or logo is offensive to local tribes or what they regard as sacred--fair enough. But by symmetry, that suggests that non-Southerners don't have standing to tell Southerners what they mean by the flag symbol. Hmm.
I've been reading a bit about the Civil War off and on the past few years, and it is abundantly clear that most of the Confederate volunteers were not inspired to fight by the defence of slavery. The powers-that-be had their own interests, but the average soldier (who owned no slaves) would more likely be inspired to fight by his understanding of liberty. That's what they often said, and one should consider the testimony of eyewitnesses over that of theory. I strongly suspect that a fear that the "meddling feds" would inspire an indescriminate slave revolt was an additional motive, but there's no reason to doubt that their understanding of liberty at the local level was a huge motivator. "That whenever any Form of Government becomes destructive of these ends..." I gather that quite a few people see Lee's battle flag as a symbol of that attitude. That attitude is well-hated in the centers of power (government, media, etc) if their vitriol is any guide--not surprisingly.
My own take on this is by anology. The swastika is a symbol estimated to be at least 5000 years old, meaning good fortune. But it has been so thoroughly tainted by Nazism that the old meaning is lost--whether the Hindus like it or not.