Violence and beauty, hate and love, are both extreme achievements of human behings and so much intertwined.
Only through a deep emotional experience can we grasp a bit of those extremes and there's no other means of comunication better to express emotion than Art.
It's upon these extremes that History has been written on, so neither one nor the other's available knowledge should be censored. If so then our path to learning is blocked, and we can't decide who we are and if we are to avoid one in favour of the other to write our present, with both freedom and responsability.