Answer:
1) Germany was broke
2)Germans were unemployed
3) Hitler's claims that he would return Germany back to its former glory.
Step-by-step explanation:
1) After WW1, Germany was blamed and had to pay the allies a huge amount of money it didn't have as said in the Treaty of Versailles. This caused huge economic struggle, and caused Germany to start printing money. Printing money actually decreases the value of money, so the German Mark was pretty much useless by 1925. The United States agreed to help out Germany and agreed to help them out with the debt. However, the Stock Market Crash, caused the US to loose money and just like that, the Great Depression is here. The US wanted its money back, and Germany once again, did not have anything. Which caused them to go into even further debt.
2) This whole debt caused the Germans to loose their jobs because the German Mark was useless, meaning factory owners and employers had to lay off people. Which again, caused even more economic downturn.
3) Germany lost territory, Alsace-Lorraine was given back to France after WW1, Poland was created on the East, and Germany was split in 2. Germany also had to reduce its military to only 100,000 men, no air force, and had to demilitarize the Rhineland, an area full of factories near France. Hitler was very mad about this, and wanted to united every Germany around the world, get back German territory, pump up the military, and increase the Aryan race, which he thought was the only race that was superior. He then went on and start WW2, but that's a story for another time.
Hope this helped m8!