we may as well devoid the arts..
the ideologies, beliefs and passions rolled into a great masterpiece is not just precise and skillful brush strokes but the authenticity of life expressed or impressed through the artists perceptions and of course life experiences....
thats what made Van Gogh's depressive art unforgettable and his ingenious masterpieces....
extreme ideologies whether in art or social behaviour and actions are psychologically and physiologically linked ... to one's life experiences, dreams, aspirations, obsessions, passions...and what have you...