In the Basque Country there is a renaissance of the new waves of social movements; demonstrations, mobilisations of the population as well as the far not less brutal street clashes have become frequent. The relationship and settlement of political violence and social movement seem to be undergoing changes during the recent few years, at the same time the media, urban management or even the discourses of social sciences often generate the opposite. The fact that history has branded certain movements and semi-political organisations with the stigma of nationalism is rooted in the endless interpretation of Basque nationalism and in the different definitions of the Basque cultural identity as well as in the different concepts of nationalism of the political forces. The present writing attempts to outline in brief the relationship between the Basque environmental movement and nationalism.