Before and during WWII, a lot of people sided with the Nazis to get out from under Russian, French, Dutch or British rule. Many* of East Asia's post-war rulers sided with Imperial Japan during the war. They sided with Nazi Germany and Imperial Japan for the same reason we sided with pitiless Russian mass murderers - the enemy of my enemy is at least my temporary ally.
* Nationalist China received large amounts of aid from Nazi Germany in its effort to crush the Chinese Communists. It had almost achieved its objective when Imperial Japan invaded, thereby saving Mao Zedong and his henchmen. Indonesia's Sukarno worked with Imperial Japan during the war and used the organizational skills and structures developed during the Japanese occupation to organize the revolt against Dutch rule in the post-war era that finally led to Indonesia's independence. Singapore's Lee Kuan Yew worked for Imperial Japan's propaganda department in what the Japanese renamed Syonan-to.
Remembering history I recall Germany, of that time, and Russia signing a non-aggression pact. Thus siding with the Nazis before WWII did not remove a lot of people from their rulers. Then hitler made an error and attacked Russia violating the non-aggression pact.