"Point is that at times performers make more of the politics than the music, spouting political manifestos, pep talks, call and response slogans and when just a little music is included then they are doing more of a political rally than a concert."

Doesn't sound like any Pete Seeger or Smother's Brothers concert I've ever attended. Sure they get their point across, but it is still a concert. Besides, why limit the definition and expecations of the word "concert"?

Protest songs are folk music.