Whatever his inner thoughts and intentions, Hitler now had to serve as a representative of his unit within the new Soviet regime. By his willingness … - Thomas Weber

Hitler’s undetermined political future becomes even less surprising if we bear in mind that the intellectual origins of Fascism share central tenets with the non-Marxist Left. According to one argument, despite its eventual collision with the conservative Right once Fascism tried to come to power, early Fascism had been in its promise, rather than in its eventual application, more socialist than capitalist, more plebeian than bourgeois.

Auer, himself, also claimed that Hitler had held sympathies for the SPD during the winter and spring of 1919. In a 1923 article Auer wrote for the Münchener Post , he stated that Hitler ‘due to his beliefs was regarded as a Majority Socialist [Mehrheitssozialist] in the circles of the Propaganda Department and claimed to be one, like so many others; but he was never politically active or a member of a trade union.

The question is not whether Hitler supported the left during the revolution, which he clearly did, but what kind of left-wing ideas and groups he supported or at least accepted. As Hitler served all left-wing regimes during all phases of the revolution until the end, he obviously accepted all of them or at least acquiesced to them for reasons of expediency.