Complex sentence: He defended Bono's gesture, after a speech on injustices, declaring that graffiti is a neccesary evil as young people do not generally have the same access to newspapers, and media in general, as politicians do to express themselves.
Split into simpler sentences: He defended Bono's gesture, after a speech on injustices, declaring that graffitis are a needed evil. Young people not having the same access to newspapers and media in general as politicians to express themselves.