I once heard a professor of physics tell us that paradoxes were just questions posed incorrectly (paraphrasing since we weren’t speaking English, sorry if I wrote it in a confusing way) and I’ve never stopped thinking about it that way

The nazis modeled a lot of their Reich on the Roman state (the eagle iconography was used by both). The Roman salute was just something else they took from their idea of the Roman empire

So I’m with you, I have no idea how “it’s a roman salute” is supposed to make anything better