Was there any time where the Chinese Blue Shirts Society could've either dominated the Kuomintang or come to power in the 1930s?
What would the years of the Chinese interwar period look like now that it's ruled by the BSS?You might have to ax off Chiang or get the right conditions (i.e. less civil war, stronger Chinese communists, etc.) for the Blue Shirts to take over; one scenario is to have the 1919 May 4th protests go wrong in where the Beiyang government goes against almost everyone in China where the opposition wins under the KMT banner and China industrializes in the 20's and early 30's yet political circumstances lead to the Blue Shirts to take over after Chiang gets assassinated by foreign agents (or at least alleged foreign agents).