Having studied history, I wouldn’t count on police informants, especially those serving fundamentally conservative authorities, to save any country from fascism. From Der Wiki:
The DAP was a comparatively small group with fewer than 60 members.[32] Nevertheless, it attracted the attention of the German authorities, who were suspicious of any organisation that appeared to have subversive tendencies. In July 1919, while stationed in Munich, army Gefreiter Adolf Hitler was appointed a Verbindungsmann (intelligence agent) of an Aufklärungskommando (reconnaissance unit) of the Reichswehr (army) by Captain Mayr, the head of the Education and Propaganda Department (Dept Ib/P) in Bavaria. Hitler was assigned to influence other soldiers and to infiltrate the DAP.[35] While attending a party meeting on 12 September 1919 at Munich’s Sterneckerbräu, Hitler became involved in a heated argument with a visitor, Professor Baumann, who questioned the soundness of Gottfried Feder’s arguments against capitalism; Baumann proposed that Bavaria should break away from Prussia and found a new South German nation with Austria. In vehemently attacking the man’s arguments, Hitler made an impression on the other party members with his oratorical skills; according to Hitler, the “professor” left the hall acknowledging unequivocal defeat.[36] Drexler encouraged him to join the DAP.[36] On the orders of his army superiors, Hitler applied to join the party[37] and within a week was accepted as party member 555 (the party began counting membership at 500 to give the impression they were a much larger party).
Less than five years later, he was a ringleader in the Beer Hall Putsch I mentioned above, where the perpetrators were let off with wrist-slaps or cushy sentences.
