The article mentions the "Association for the German Language", which seems to refer to the prescriptivist "Gesellschaft für deutsche Sprache".
It's important to understand that few Germans are even aware it exists and its conservative views are extremely unpopular and non-standard. Even the Council for German Orthography which regulates German orthography as taught in schools only has two Association representatives in its total of 18 German council members.
In practice Germans generally regard the Duden (the equivalent of the Oxford English Dictionary) as the ultimate authority on German orthography and vocabulary. And the Duden generally takes a descriptivist approach, adapting to language change rather than trying to halt it.
Additionally, there seems to be a strong correlation between Germans with strong opinions about loan words and Germans with strong opinions about immigrants (or more recently the loss of "occidental identity" via "Überfremdung").
There are of course people who feel strongly about language who aren't also nazis in the more literal sense but the kind of complaints people have about language use often gives you a relatively safe indicator of their political views:
Complaining about wrong apostrophe use: moderate grammar nazi
Complaining about excessive use of English loan words in office culture: red-blooded grammar nazi
Complaining about "Elektronik" not meaning "electronics": moderate actual nazi
Complaining about "Handy" or "Portemonnaie": red-blooded actual nazi