I had a chance of attending a lecture by Albert Kapr, maybe a year or so before he died. His book on typography was, essentially, the "Bible" for anyone studying typography in the 60s-90s in the former Soviet Union, probably still is. Our typography coursework was, essentially, designed on his book's (the Art of Lettering) examples. I've also seen some historical books printed in Germany some preceding Nazi rule, some during and some shortly after.

I'm almost hundred percent sure I've seen Mein Kampf seen set in Schwabacher which was printed while Hitler was still alive, but I'm not sure on the exact year. I'm also certain I've seen Hanns Johst's plays posters set in (stylized) Fractur. I'm sure you can find the Nibelungen posters with the same kind of (stylized) font from that time.

So, at least in the way things are presented in Kapr's book, and I think it was understood that way even before him, Fractur has much to do with the development of printing, especially the part where individual letters were reused (early printing used to etch the entire page at once). Germans would have a reason to be sentimental about that font because, after all, they were the inventors of this kind of printing. I could see how this would be in line with nationalism.

Similar, for example, in Russia, the stylized variant of pre-Peter I (a.k.a. "early Cyrillic" or "church-Cyrillic") is still a popular choice for all sorts of nationalist propaganda posters, even though it was replaced in the late 16 hundreds.

Similar, in Ukraine, there are fonts that strongly associate with nationalism, eg. https://en.wikipedia.org/wiki/Ukrainian_skoropys and Georgij Narbut's font: https://luc.devroye.org/fonts-86142.html even though they are impractical and aren't used for everyday tasks.

In Hebrew, there's Hayim font, that strongly associates with the Zionism / Socialism movement of the pre-declaration of independence and soon after, but the font otherwise isn't very useful for modern everyday needs.

* * *

Bottom line: I don't think Nazis represent the whole spectrum of nationalism. On the other hand, nationalism will find and glorify original local developments, in typography just like in any other field.

My reading of Nazis is that nationalism wasn't their main goal. Their appeal was "law and order at any cost", "removing impediments to prosperity, whatever they may be" much more so than digging up historical relics confirming the eternal greatness of Aryan people. Textbook nationalists are rarely expansionists: they may be hostile to their neighbors having claims to some historically contested territory, but they don't normally launch conquest of far-away lands. The later seems to be more of a thing of people with more universal ideologues.