This is a meta post, but I have less then 5 reputation, so I cannot on meta.
I am German and in my opinion Nazi-germany might be historically correct, but it sounds that Germany and Nazis are still connected. And Nazi-Germany is "easier to say" than National-Socialism-in-Germany
I would prefer to rename the tag to nazi or historic-Germany or Germany-during-ww2 or National-Socialism-in-Germany
IMO the tag serves its purpose. "Nazi Germany" is a well understood term to describe an important period in German history under the Nazis. Once you're here a bit more, you'll find this hasn't been a source of confusion (examples on History.SE where it was are welcome). What has been is people coming in with an agenda to cause confusion, those are quickly downvoted and/or deleted. This is a general problem with any controversial historical topics.
As to the proposed tags, they are not synonyms.
nazi or National-Socialism can be from any period and not specific to Germany.historic-germany spans the entire history of Germany.germany-during-ww2 does not cover the whole of the Nazi regime which existed prior to WW2.Another attempt might be germany-under-the-nazis but this implies the Nazis conquered or occupied Germany rather than being the (arguably) legitimate government. Compare, for example, france-under-the-nazis.
Each tag has a short and long description to avoid just this sort of confusion. Here is nazi-germany's short description at the time of this writing.
The period of German history from 1933 - 1945, specifically regarding the rise of the National Socialist German Workers Party.
As a German, I hold the exact opposite view. To me, the tag nazi-germany means that it's sufficiently distanced from the distinct tag germany. It's a very specific time-frame and history episode, so it exists as a separate tag as compared to just tagging it germany and nazi, which puts it close to all the other questions about the lighter side of German history.
As an analogy, I would point out that there is a tag for British-Empire. Theoretically, there never was a "British Empire" as such - British monarchs from Victoria to George VI were Empress/Emperor of India, but nowhere else. However, the term British Empire is widely understood to mean Britain's hegemony during a particular period of history, so is useful. From 21st Century perspective, much of what was done in the name of British imperialism is utterly unacceptable, but that is historically irrelevant. It happened, we can only attempt to understand it.
