True, the Serbs were murdering bastards, but they only did in their own country.
9/11 showed us the Islamist Terrorists know no borders.
We need to be careful about terms.
Communists were murderous and they are/were not necessarily Serbs. There were many if not more Croats, Bosnians, Albanian Commies...no single ethnicity is responsible for the Marxist horrors unleashed on innocents over the years whether in the Balkans or in Asia.