How did the “stab in the back” myth contribute to the nazi rise to power?

The stab in the back myth was the notion, widely believed and promulgated in right-wing circles in Germany after 1918, that the German Army did not lose World War I on the battlefield but was instead betrayed by the civilians on the home front, especially the republicans who overthrew the monarchy in the German Revolution of 1918–19. Advocates denounced the German government leaders who signed the Armistice on November 11, 1918, as the "November Criminals"

The Nazis came to power in 1933, they made the legend an integral part of their official history of the 1920s, portraying that the work of the "November criminals" who stabbed the nation in the back to seize power while betraying it.

Because of this people believed the Nazis were still very much so strong and capable to protect Germany. They tried to make people believe this so that they wouldn’t come off as weak. The more people who believed this resulted in more people following the Nazi’s.