It’s not nonsense, as you cannot carry on mass-killing events like the Holocaust or the Goulag without a modern-ish technology like the railway system. Or, to go directly to the source, let’s use Goebbels [1], as he was explaining that without modern technologies like the radio or the airplane the nazis’ ascent to power wouldn’t have been possible:

> It would not have been possible for us to take power or to use it in the ways we have without the radio and the airplane. It is no exaggeration to say that the German revolution, at least in the form it took, would have been impossible without the airplane and the radio.

[1] https://research.calvin.edu/german-propaganda-archive/goeb56...