The revolutions of Eastern induced fragmentation of States were accompanied internally by a revival of ethnic parties, which is not without its problems in political democracy. Transitions and even more democratic consolidation are emerging a double phenomenon of interaction between actors and the system in search of a new equilibrium. Ethnic parties then politicize the system opens the ethnic actor. We are witnessing an evolutionary adjustment of the system to the new situation. The system opens to the new demands ethnic ways and to different degrees: between legalization and tolerance. Side actors, are gradually returning ethnic parties in the political game, in different ways and to different degrees. In our problem the field deploy interactive relationships between multi-level actors (parties-States) and in the various fields (political, societal and legal). Their connections are crossed between the State and international space, public and civil, political and social, with host countries or origin, but also the third States. They are separatist ambitions or simply political lobbies. We tried to highlight the main aspects of the complexity of the ethnic issue in young democracies political '' in consolidation ''. The ethnic problem of CEEC can help us to complete updating some general visions of political science? The actors involved are invited to avoid the pitfalls of nationalism perceived as '' petty '' or '' chaotic '' while serving the cause of a more flexible policy integration to the ‘‘democratic peace’’.