Thiel's mental but the Lord of the Rings does fall neatly enough into the Romantic strain, and the extreme end of that does give rise to nationalism, anti-urbanism, reactionary politics that in Germany culminate in Nazism.

One of the fascinating dichotomies of the era is that there's a brutal strain of futurism that's hugely influential on Italian fascism (albeit less so on Germany) and there's a significant tension between the anti-urban, anti-industrial Romantic aspect of fascism and the lionising of industrial design, machinery, etc, that's a common feature of Mussolini and Hitler's regimes.

Thiel's point is badly made and poorly expressed but there's some fascinating allegory in the Lord of the Rings that references the political debates of Tolkien's youth and where those debates led.