Bulgaria has done it to its Turkish citizens as late as 1995. It cannot be hastened or imported. It must grow from within, by integrating experiences, including painful and traumatic ones. Any foreign intervention serves only to exacerbate the situation by increasing the number and intensity of inter-ethnic grudges. The seeds of the current conflict in Kosovo were sown by the Ottoman Turks as early as 1912.
Foreign interventions tend to boomerang in the Balkans.