The Confederacy stood for the forcible subjugation of other people. If there is a benefit to honoring the concept of or symbols for the Confederacy I don’t see it. Taking these symbols out of the public sphere is a net positive, even if some people are able to simultaneously a) disassociate those symbols from the oppression they represent and b) venerate those symbols.
To be consistent, note that the radical Islamic ideology also calls for the forcible subjugation of other people. Furthermore, it seems clear that in the last few decades a heck of a lot more people have been killed or enslaved by those following a radical Islamist ideology than a Confederate (or similar fellow traveler) ideology.
So… are there symbols that matter to the radical Islamists that should get the Confederate statue treatment?