The difference between patriotism and nationalism is that the patriot is proud of his country for what it does, and the nationalist is proud of his country no matter what it does; the first attitude creates a feeling of responsibility, but the second a feeling of blind arrogance that leads to war. — Sidney J. Harris
Patriotism is a lively sense of collective responsibility. Nationalism is a silly cock crowing on its own dunghill and calling for larger spurs and brighter beaks. I fear that nationalism is one of England’s many spurious gifts to the world. — Richard Aldington
From Crooks and Liars.