Answer:
WHAT IS THE DIFFERENCE, THEN?
An excess of patriotism in the defense of a nation is called chauvinism or jingoism.
The difference between patriotism and nationalism is simple - a patriot loves his country and is proud of it for what it does whereas a nationalist loves his country and is proud of his country NO MATTER WHAT IT DOES.
Quite clearly, patriotism nurtures a feeling of 'responsibility' in the citizens while nationalism breeds 'blind arrogance' or ignorace and often, that leads to a war.
