Florida school board votes to remove name of Confederate general

[Posteritatis]

51. That situation as a whole's actually pretty rare

Colonial states notwithstanding, not many nation-states (and I'll consider the CSA one for the purposes of discussion) have been completely overrun and annexed like that in the last century or two. Flying the flag of an annexed state was traditionally a bit of a no-no and generally dealt with (too) harshly, not situations where that was happening were more often either resurgent nationalism from a country which had disappeared some time before, or a pushback against a far more recent annexation.

The situation in the south - where a large, relatively modern country existed for at least long enough to wage a coherent war for awhile, was defeated by another power, and completely (re)absorbed - is rare enough in this day and age that there isn't really any way to apply some basic rules-o-history to it like you did with the mention of Germany.

In most cases there's no shortage of names and other references hanging around popular culture, unless the controlling authority is actively trying to suppress the culture at large, at which point we're back into thorny ethical territories. Part of the difference there is that the United States generally recognizes broader political rights than most other countries who denied a region's exit visa with force of arms.