German historian Klaus Hildebrand insisted that Hitler's moral responsibility for the Holocaust was the culmination of his pathological hatred of the Jews and his ideology of "racial dogma" formed the basis of Nazi genocide. Historian David Welch asserts that even if Hitler never gave the direct order for the implementation of the Final Solution, this is nothing more than a "red herring" as it fails to recognize his "leadership style" where Hitler's simple verbal statements were sufficient to launch initiatives "from below". Those "working towards the Führer" would often implement "his totalitarian vision without written authority". Throughout his work "Hitler and the Final Solution," historian Gerald Fleming demonstrates that on multiple occasions Heinrich Himmler referenced a Führer-Order concerning the destruction of the Jews, making it abundantly clear that Hitler had at the very least verbally issued a command on the matter. The diary entries of Propaganda Minister Joseph Goebbels allude to Hitler being the driving force behind the Nazi genocide, that he followed the subject closely and that Goebbels even described Hitler as "uncompromising" about eliminating the Jews. Taking the scale of the logistical operations that the Holocaust comprised in the middle of a war into consideration alone, it is highly unlikely, if not impossible, that the extermination of so many people and the coordination of such an extensive effort could have occurred in the absence of Hitler's authorization. As Welch relates, if Himmler was the "architect of genocide", he was merely "an instrument of Hitler's will". In the final analysis, Hitler was essentially omnipotent as the Führer of Nazi Germany with all encompassing power as the "supreme legislator, supreme administrator, and supreme judge" along with being the "leader of the Party, the Army, and the people". Hitler ruled the Nazi Party autocratically by asserting the (leader principle). The principle relied on absolute obedience of all subordinates to their superiors; thus he viewed the government structure as a pyramid, with himself—the infallible leader—at the apex.