 Nevertheless, Macedonist ideas increased during the interbellum in Yugoslav Vardar Macedonia and among the left diaspora in Bulgaria, and were supported by the Comintern.During the Second World War Macedonist ideas were further developed by the Yugoslav Communist Partisans, but some researchers doubt that even at that time the Slavs from Macedonia considered themselves to be ethnically separate from the Bulgarians.The turning point for the Macedonian ethnogenesis was the creation of the Socialist Republic of Macedonia as part of the Socialist Federal Republic of Yugoslavia following World War II.