Rassenwahn
German science in early twentieth century was sophisticated, and Nazi theorists had to pay it lip service as they constructed their racial empire. Definitions of key terms like blood or race were never arrived at. Who or what was a Jew? Hans F. K. Günther and other Nazi race theorists were poorly trained and vague. The same was true of Alfred Rosenberg, one of the most influential race ideologues of the Nazi Party. Their works were taken seriously by Nazi bureaucracy. Throughout the Reich, race theorists helped the bureaucracy. George-Alexis Montandon, the Swiss-born, naturalized French physician and polygenist anthropologist, selected Jews in France for deportation using utterly dubious criteria. Exhibitions on race and centers of study were set up to promote Nazi race policies. Relatively little new physical anthropological research was conducted on Jews because it would have undermined the basis of racial laws. Attempts were made to see if Jewish blood was different. Non-somatic research into Jewish difference was carried out by Ludwig Ferdinand Clauss. Nazi Jewish studies had to engage with the black Jews who had troubled polygenists.