Why did the collapse of the soviet union and the power vacuum in the balkans lead to bosnian genocide?

 Following the collapse of the soviet union and lack of decisive leadership after Tito in Yugoslavia, a new breed of divisive politics blossomed fueled by Serbian nationalism. Tito had served to unite the various ethnic groups and Muslims into one major Yugoslavia state under the patronage of the Soviet union. with soviet not eager on supporting any other leadership,  warring leadership factions emerged. Weak leadership always have to cling on divisive politics such as nationality and ethnicity which culminated into Bosnian genocide, where Muslim minorities were utterly massacred.