I personally found the question of linguistics governing national identity to be particularly interesting. We now live in a world where we know a good deal about other cultures and languages and are even learning to be fluent in said languages. In a time when national lines were just being drawn up this might have been a tough concept to grasp. Obviously, after living alongside these cultures and languages for so long people would have known a good deal about them but as the trend toward different national identities shows, they felt the need to draw apart. The question of if there can be a bilingual or multilingual state is an interesting one. Now that seems to be commonplace perhaps not on an official national level but on a local everyday level there are areas of our country where you encounter multiple languages nearly constantly. Thinking back to the rise of democracy and nationalism this idea would be tough to pull together seeing as each linguistic group was pushing for their independence.
My only question is how, when so many people were so many groups fighting for their own independence, were there still groups being treated in an unfair fashion? One would think that these groups would govern themselves and suffer little mistreatment from others unless they provoked it.