[O]n surviving film footage of Eisner’s funeral we see Hitler with a few men from his unit walking behind Eisner’s coffin in the funeral procession o… - Thomas Weber

On April 27, the troops that Hoffmann and Noske had amassed—a formidable force of thirty thousand men—crossed into Bavaria… On the following day, mass desertion in the Red Army set in. Hitler, however, did not defect. Furthermore a sufficiently large number of men stayed behind for Rudolf Egelhofer to organize a last stand.

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.