The problem I pose is to understand not who were influential leaders in forming the ideas underlying Nazism, but the social forces that made that point of view acceptable and brought the Nazis into power over the bodies, live and dead, of most decent, cultured and educated Germans at that time. It was a politics of disafection, certainly, and England France and communist Russia bore no small part of the responsibility.
Well to answer this is easy. The thing is that most Germans of the beginning 30ties were no educated people. They were simply not mature enough for democracy after following imperators, kings and nobelities for hundreds of years. The German Weimarer republic was only 15 years old when Hitler and his circus happened and there was no tradition for democracy. Most people were insecure in the economical difficult times (Germany had a terrible unemployment rate in 1932) and suffered from the treaty of Versailles. They were looking for easy solutions. Hitler was such a easy solution. As a exceptionally gifted speaker he dazzled the common people. This was the reason why 33% voted for Hitler in 1932.
BTW - We Germans deal with simular problems today in eastern Germany. To someone like me it is not understandable that there are 30% population that are dumb enough to vote for the SED (now called PDS, die LINKE), the former communist party of Erich Honecker. Of course there are some nazis in Germany left, but they do not play a practical role anymore in contemporary politics. Their party, the NPD is more or less a idiotic possibility of weird kids to shock their parents.