The problem with your analysis is that the Nazi leadership believed in their extreme antisemitic ideology  back when they were part of 'the masses'. The same was true of a substantial minority in many parts of Europe (France, Poland, Hungary etc.). It is true that ideologies are related to socioeconomic circumstances - in this case the break down of traditional social structures as a result of industrialization and the other aspects of what is commonly known as 'modernity'. Radical antisemitism offered an all encompassing explanation of the disruption. In that sense it is analogous to Marxism, though unlike Marxism it was not a rational and cogent analysis of what was going on. But it is no accident that socialist leaders referred to antisemitism as the 'socialism of idiots'.

The Nazi leadership and much of its rank and file sincerely believed the hodge-podge of quack ideas that constituted their ideology. Ideology was a means to power, but power was simultaneously a means to put that ideology into practice.