Violence, guilt, and blindness
Most violent acts are done offstage - Macbeth killing MacDonald, Duncan, lm's suicide, Macbeth's beheading
Exceptions banquo & macduff's family, done by minor characters, de-emphasising the violence and excluding Macbeth, placing greater emphasis on the psychological motivations & consequences "o, full of scorpions is my mind"
Some atrocities are so awful that even death finds them intolerable