Basically I agree that since there are diverse assessments in various RS on the topic of this article, all statements should be sourced. 
You mention a "consensus theory" that includes Germany along with Italy (1918-1945), which is something with which most people would not disagree. The time frames are relevant to discussions of the left-right political spectrum characterizations, etc. As pointed out in Great_depression#Germany, for example, the Great Depression had a severe impact on the unemployment in the Weimar_republic#Onset_of_the_Great_Depression, facilitating the rise of the National Socialist party, etc.
It would seem evident that monumental disasters like the Great Depression had an effect on the ideology of Fascism and other movements as well. I'm sure that the sources address these issues much more thoroughly than is reflected in our article. For example, the following paragraph cites no sources whatsoever, does not even include a Wikilink to the Weimar Republic article, and seems to be generally lackingThe events of the Great Depression resulted in an international surge of fascism and the creation of several fascist regimes and regimes that adopted fascist policies. The most important new fascist regime was Nazi Germany, under the leadership of Adolf Hitler. With the rise of Hitler and the Nazis to power in 1933, liberal democracy was dissolved in Germany, and the Nazis mobilized the country for war, with expansionist territorial aims against several countries. In the 1930s the Nazis implemented racial laws that deliberately discriminated against, disenfranchised, and persecuted Jews and other racial and minority groups. 連絡 見学/迷惑