Answer:
Whilst the Nazis’ own actions, such as the party restructure and propaganda, certainly played a role in their rise to power, the economic and political failure of the Weimar Republic was also a key factor.
Germany’s economy suffered badly after the Wall Street Crash of 1929.
Germany was particularly badly affected by the Wall Street Crash because of its dependence on American loans from 1924 onwards. As the loans were recalled, the economy in Germany sunk into a deep depression. Investment in business was reduced.