It was at least fleetingly popular with at least one major figure, yes -- though one must naturally be cautious in taking a single example as definitive of an epoch.

The deposed German Kaiser Wilhelm II, in exile in December of 1919, wrote to Field Marshal August Von Mackensen that he believed he had only been forced to abdicate because the German people "had been egged on and misled by the tribe of Judah." He went on to refer to the Jewish population of Germany generally and Europe broadly as "parasites," and hoped that the German people would not rest until the Jews "have been destroyed and exterminated from German soil."

It got worse, incredibly, as the deposed emperor called for a global pogrom against the Jews, denouncing them as "a nuisance that humanity must get rid of some way or other." Chillingly: "I believe," he concluded, "the best thing would be gas!"

This material can be found in Kaiser Wilhelm II: New Interpretations -- The Corfu Papers (1982), edited by John Rohl and Nicholaus Sombart. It should also be noted that the deposed Kaiser's relationship with the German Nazis was ambivalent and complex, and that he seems to have viewed their excesses in this direction with distaste. He died in 1941, in any event, so we will never know what he might have thought of how things eventually turned out.