I see you're new. Welcome to the forum here. And thanks for assisting in preserving those 'forgotten texts'.
With the coming of the internet far more literature from the pre-1945 era has become accessible to ordinary people. It was more difficult prior to the 1990s and one had to be deeply into the subject to know more than was spoonfed via MSM at the time.
A large portion of previous NS-literature was poured down the memory whole although one always could get fragments on the antiquarian market. The 'dememorization' wasn't limited to NS-literature proper. It was actually directed against virtually all culturally conservative literature. Especially, when it was pro-folkish and conservative-Christian in its stance (This was more of a battle inside the German Protestant Church, though). In the general political arena this was mostly against the folkish / ethno-nationalist stuff, letting the general secularization take care of the Christian ones. What was promoted in Germany were egalitarianism, anti-authoritarianism, pacifism, social gospel, sexual liberation, and virtually anything foreiggn. The technical domains void ethno-nationalist connotations were however allowed to remain 'German'. The changes there are more since the 2000s and linked to the general decline of German culture, which became more measurable since the 1970s (When those that still recalled the Kaiserreich were slowly dying off - And the boomers came of age to tool over the reigns).
With reeducation having become a dubious success, it seems academics feel more confident to have 'old literature' published again. One source I recently discovered is the literature of the so-called "Kirchenkampf" inside the Protestant Churches in Germany. It's of course itself over a spectrum with various stances being taken by theologians and other authors.
Other sources I noticed where the "Schulungsbrief", but also books by various National Socialist authors on various topics.
What also changed is the book market... Meaning printed books... Old fashioned bookshops are more and more a phenomenon of the past, since people can access literature online now. That also breaks the oligolopolistic publishing industry, with many countries like Germany having perhaps a hand full of large publishing houses that dominated more than 90% of the market and where often intertwined through mutual shareholding and relationship overlap.
Another Issue is the customer market. And Germans were none to be passionate readers and consumers of literature of all types. There numbers are however shrinking now, given to the smaller amount of children born per woman. And that isn't replaceable with foreigners, who tend to read far less than Germans.
Well, let's hope that the remaining Germans smell the coffee and achieve a turn around on the issues that plagued them the past decades.
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As for the "Kirchenkampf" one can get literature here:
https://www.kirchenkampf.info/