Yugoslavia was an ethnically mixed state, with the exception of Slovenia. Serbia tried to keep its terriorially disparate Orthodox communities in one state, but was too weak to do so in the end. There was also a growing unwillingness of the rich northern countries to pay for the less developed southern countries (just like today in the EU).
After the economic failure of communism, there was also a crisis of idealism and people were trying to find meaning in their past religious traditions. Politicians inflamed the divisions to secure their power. Islamism had hardly anything to do with it.
Yugoslavia was an ethnically mixed state, with the exception of Slovenia. Serbia tried to keep its terriorially disparate Orthodox communities in one state, but was too weak to do so in the end. There was also a growing unwillingness of the rich northern countries to pay for the less developed southern countries (just like today in the EU).
After the economic failure of communism, there was also a crisis of idealism and people were trying to find meaning in their past religious traditions. Politicians inflamed the divisions to secure their power. Islamism had hardly anything to do with it.