Nationalism and the creation Italy

Nationalism to me means that you are proud of your country and where you come from. I am some what nationalistic I am proud to be from America I'm also happy to be Cuban as well. I eat Cuban food I wear the Cuban and American flag, but sometimes I wonder if I like being from America because sometimes we can be very selfish and we are in a very tough Recession and our crime rate is threw the roof. Some people that that nationalism is a force of disunity and some people think that it is a force of unity. Nationalism broke up 400 year old empires and people really started to realize that nationalism can bring together masses of people.