Yugoslavia blew more because of the collapse of the Soviet Union than Tito's death. Tito had been dead for many years and still the Yugoslavs hung together out of fear of a Soviet invasion.
The nation had been highly artificial from the start and was much more a product of the fortunes of wars than any authentic union of like peoples. The very name "Yugoslavs" merely means "south Slavs", hardly the rallying cry of burning national identity. It was made of up peoples who had fought each other of countless centuries and had never stopped distrusting each other into modern times.
Ultimately a nation comprised of half dozen major peoples most with their own languages, two alphabets, and two antithetical religions was unsustainable. The profoundly evil Milosovich capitalized upon these divisions and insured the end was a violent one.
Iraq is also a highly artificial nation as are most of the Arab nations. It was a creation designed to serve the past interests of western powers. It has the advantage of being comprised principally of Arabic speaking Arabs who predominately practice the same religion. It has the disadvantage of including a large Kurdish region and of have two antagonistic Islamic sects.
I think it is even money whether Iraq can maintain a democracy. Over the longer haul the country is bound to split up if for no other reason than it is a phony state.
In general I agree.
However, Iraq is no more phony than a great many other countries: India, Nigeria, Pakistan, Sudan, South Africa.
In much of the world, ethnic/linguistic groupings have little to do with where political boundaries are drawn.
Will enough Iraqis think of themselves as Iraqis before thinking of themselves as Sunnit, Shi'ites or Kurds?
Obviously not enough Yugoslavs thought of themselves as such rather than Serbs, Croats, etc.
Historically, the idea of Yugoslavia was formed as a way of grouping together enough of the peoples in the area to allow them to stand up to the Austro-Hungarian and Ottoman Empires, long before the USSR was a threat. Sort of the inverse of "divide and conquer."