By the time the Great Depression hit, Germany was already suffering from a very weak economy. The reparation payments due from the Versailles Treaty just added another straw on the back of the camel, to paraphrase an old saying. The US was lending Germany money but the money was not used to shore up the economy or provide jobs, but was merely sent to England and France as part of the reparations. The dire political and economic problems enabled the Nazi Party to gain support in Germany.
Which government?
The Nazi Party. From 1919 to 1920 there was a party called "German Workers' Party", which was founded on far-right and nationalist tendencies then common throughout Europe, in part as a result of the Great War of 14-18. In 1920, the party evolved into the National Socialist German Workers' Party, commonly known as the Nazi Party, which was dissolved in 1945. It was that party which was responsible for organizing the Holocaust. Wikipedia has a great page on the NSDAP.
Bank failures took potential investment capital away from America.
It spelled the end of many economic opportunities for both groups.
The prohibition of alcohol was not supported by most Americans in the 1920's.
In the early 1920s, the German economy was in shambles. The poor economic situation was caused in part by hyperinflation.
Lots of Slovaks migrate to the US in 1900-1920. They immigrate because Slovak was a part of Austrian-Hungarian Empire where was economic crisis.
It was in the 1920's
Drought, overuse of land
It was in the 1920's
German Party of the Zips was created in 1920.
Bruch
National Bureau of Economic Research was created in 1920.
Economic Calculation in the Socialist Commonwealth was created in 1920.
In the 1920 it was automobile significant impact
The German population in 1920 was roughly 65 million.
Fricourt German war cemetery was created in 1920.