What?! Of course it was - history time: the small feller with moustaches joined an anti-capitalist workers party. It's in the name - it was socialist but nationalist so anti-communist but still decidedly to the left of say the DNC today. Check the manifesto including things like banning rentiers, seizing land, obligating pensions and this little gem "We want all very big corporations to be owned by the government" etc. The moral is that its not where you start, its where you go that matters.
Source: I read a biography on Hitler, but I don't have time to go track down the exact citations/references. This page might be a good start:
There were factions in the Nazi Party, both conservative and radical.[23] The conservative Nazi Hermann Göring urged Hitler to conciliate with capitalists and reactionaries.[23] Other prominent conservative Nazis included Heinrich Himmler and Reinhard Heydrich.[24]
The radical Nazi Joseph Goebbels hated capitalism, viewing it as having Jews at its core, and he stressed the need for the party to emphasise both a proletarian and national character. Those views were shared by Otto Strasser, who later left the Nazi Party in the belief that Hitler had betrayed the party's socialist goals by allegedly endorsing capitalism.[23] Large segments of the Nazi Party staunchly supported its official socialist, revolutionary, and anti-capitalist positions and expected both a social and economic revolution upon the party's gaining power in 1933.[25] Many of the million members of the Sturmabteilung (SA) were committed to the party's official socialist program.[25] The leader of the SA, Ernst Röhm, pushed for a "second revolution" (the "first revolution" being the Nazis' seizure of power) that would entrench the party's official socialist program. Further, Röhm desired that the SA absorb the much smaller German Army into its ranks under his leadership.[25]