I cannot resist giving my own opinion on this topic. First of all, that soviet-socialism and fascism in the thierties and fourties share common traits can be explained, in my opinion, by the shared antagony to liberalism and capitalism. Hitler was anticapitalistic, but not from a socialist point of view, but from a - in german it is called - "völkisch" one, a word related to "Volk", meaning people. Were leftist wanted to achieve World Revolution, Solidarity amongst the proletariat of the world and finally communism, fascist and especially Nazis thought of a "Volksgemeinschaft" meaning the sacred community of the - in this case german - people.
Seemingly leftist parts of Hitlers policies like the "Reichsarbeitsdiensf" (Reichs Labour Service), in which every male from 18 - 25 years had to serve for 6 Months reduced unemployment drastically, but were also an instrument of militarization and indoctrination, and not an instrument to help the people really, but for cheap labour and good looking statistics, no long term thing.
What I am trying to say, Hitlers policies might seem leftist, but they served no leftist cause. Its goals were to establish the Volksgemeinschaft, which has nothing of the emancipatory traits commonly associated with socialism or leftism (theory, that is, not soviet pracitce).