This is an odd formulation. Yugoslavia is the only part of the former republic of Yugoslavia that is ethnically mixed. Croatia, Slovenia, and Kosova all being defined in an act of ethnic purification - and Bosnia by one of ethnic partition.
Yugoslavia is not 'carving itself up', it is being carved up. Each of the ethnic separatist movements in turn was sponsored by the West, as in the instance when US advisors assisted in the ethnic cleansing of Krajina. -- Jim heartfield