You do realize the Jewish hope from an OT perspective includes realization of a 'one world government'? Take also the belief in a millennial period of peace and righteousness with the Messiah ruling and reigning the entire world', besides a new heaven and earth wherever you them put in time.
Sooner or later, whether a 'one world government' is headed by the true Messiah or the anti-Christ,...its 'assumed' that these will be actual states one day. How do these 'assumptions' hold? The thing to consider is will such a government be held by true and good principles, based on integrity, truth, mutual co-operation, tolerance and justice. If world peace can be sustained upon the grounds of real justice/righteous relations and mutual respect....world peace COULD be realized. Do you accept such a Utopia for our world?