You're way ahead of me (I'm at page 280 or so), but googling I've not found what you are after specifically. There are some jstor hits about Mann and anti-semitism, and Mann and the rise of fascism (which he strongly denounced).
Myself I'd be intrigued to see how WWI crept in the book, since he worked on it from 1912 to 1924. But I'm not far in enough to see the influence of WWI come to the fore, however obliquely, I think.
Still immensely enjoying the book btw.
― Le Bateau Ivre, Sunday, 29 March 2020 10:31 (three months ago) link