This graphic encapsulates my feelings on nationalism, closely related to patriotism, very well. A thoughtful and well informed citizenry is the best guarantor of good government in the short term and life and liberty in the long term.
Nationalism and patriotism are related but distinct phenomena. I researched this distinction to ensure that my own understanding accords with the common understanding of Patriotism versus Nationalism. I found this post very helpful in understanding how others view this distinction.