Nationalism is loyalty and devotion to one's nation. Composers created music directly inspired by political events and showed people's fears,hopes, and dreams.
Technically it's all both
Traditional music and songs are those played for a long period of time already in the country. While modern music is those occurred starting in the 20th century.
Country music is always trying to find a balance between the two kinds of music to give importance and recognition. The listener ages vary, but both old and young ones will listen since country music is in between.
