Why did Germany and Japan place the blame on other countries for their economic downturns during the Great Depression?

Answer 1

Read these search results carefully:
https://www.google.com/search?q=reasons+for+germany%27s+dissatisfaction+after+wwi&oq=reasons+for+germany%27s+dissatisfaction+after+wwi+&aqs=chrome..69i57.24211j0j7&sourceid=chrome&ie=UTF-8

Now conduct the same kind of search for Japan (post WWI) and read lots.

Let us know what you learn.