Identity is too complex a phenomenon to boil it down to such simplistic notions as nationality or political party. Nationalism cannot express a 'whole' identity, and therefore always forces people to ascribe to philosophies which left to their own devices they would not have supported. And that is how we get wars. Thz nation-state is the modern version of the regional tribe, and tribal culture is what causes wars. In that sense, there is no instrument more damaging to human rights than the nation state.