On the effect of patriotic propaganda
A study released recently compared the attitude of people to cultural differences before and after listening to patriotic music and found that:
"(...) preliminary findings showed that the patriotic songs had a negative effect on the participants, as shown through their responses to the survey's questions about other cultures and diversity. The patriotic songs made the participants close-minded and prejudiced.
"Once they were in a patriotic point of view, they were less empathetic," Alvarado said. "They didn't put themselves in other people's perspective."
Interesting analysis of the effects of propaganda, however, I am a bit skeptical that a single song in a controlled environment can do that much.