lack of reading
The OP meant extreme punishment to Germany over WWI (which Germany didn't start). Extreme punishment led oppressed Germans to become politically scattered hence the fringe Nazi party won. Kind of like how Arnold Schwarzenegger won the California Governorship in a field of 28 candidates after Gray Davis was recalled for bungling the electric power grid.
Many people down voted the OP, likely they didn't understand the history of how WWII started, which is based on how WWI ended, which is completely divorced from how WWI started, which is based on 19'th century European politics.