 Forever a political opponent of Piłsudski , Dmowski favored what he called a " national state , " a state in which the citizens would speak Polish and be of the Roman Catholic faith . If Piłsudski 's vision of Poland was based on the historical multiethnic state that had existed under the Jagiellonian dynasty , which he hoped to recreate with a multinational federation ( Międzymorze federation ) , Dmowski 's vision was the earlier Polish kingdom ruled by the Piast dynasty , ethnically and religiously homogeneous . Piłsudski believed in a wide definition of Polish citizenship in which peoples of different languages , cultures and faiths were to be united by a common loyalty to the reborn Polish state . Dmowski regarded Piłsudski 's views as dangerous nonsense , and felt that the presence of large number of ethnic minorities would undermine the security of Polish state . At the Paris Peace Conference , he argued strenuously against the Minority Rights Treaty forced on Poland by the Allies . 
