Good catch.
I think Dajjal meant a 'pro-Mises' sentiment by saying Austrian School, in opposition to the cartoon.
Of course, the cartoon does depict a certain "Chicago style" mentality, or Berlin, or Mecca, or Beijing...
The most important point Hayek makes is that Nazism wasn't unique to the Germans ie there wasn't (isn't) some inherent evil lying in wait for the proper moment to be released.
No, his central point was that since Germany was the most socially/economically developed country in the world (dating from the 1870s), the citizens were the first people to experience the net result of democratic socialism. (Not to be confused with the Russian revolution.)
Once the essential barriers between people and state were undermined, a Hitler could waltz right in. His warning was to the English (and Americans), who believed it couldn't happen to them.