Time is a convenient filing system human beings have devised to segregate their experiences.
Music itself was color-blind but the media and the radio stations segregate it based on their perceptions of the artists.
Humans tend to segregate the world: enemies on one side, friends on the other. Friends are the people we know. Enemies are the Other. You can do just about anything to the Other. It doesn't matter if this Other is actually guilty of any crimes, because it is a matter of emotion, not logic. You see angry people aren't interested in justice, they just want an excuse to vent their rage.