Malcolm's reference to Macbeth as a 'Dead Butcher' and Lady Macbeth as a 'Fiend-like Queen', is not entirely true. This is due to the fact that at the beginning of the play, Macbeth is shown as a very brave soldier, with good morals and very loyal to Duncan. Later on in the play he hires murderers and mercenaries to assassinate innocents for him by telling them lies of treachery about the victims.
Macbeth's fall into darkness and evil is not entirely his fault though, as there is also Lady Macbeth, who has a right to be called a 'Fiend-like Queen', mainly because of her role inspiring and stirring up the evil and dark emotions inside of Macbeth to commit the murder of Duncan. There is also the witches who feed Macbeth the idea of becoming king. First, by promising him Thane of Cawdor and then king. Macbeth, after meeting the three witches, is greeted by Ross and Angus to deliver the news of his awarding of Thane of Cawdor. Macbeth at first is unable to believe this. Banquo says "What? Can the devil speak true?" which already suggests the idea of having ties with evil and darkness. As a result of this news, Macbeth starts thinking more deeply about becoming king and so he is led to contemplate about the murder of Duncan. "If chance will have me king, why, chance may crown me, without my stir". He also shows his fear of committing the murder because of his loyalty to Duncan. "If good, why do I yield to that suggestion who horrid image doth unfix my hair, and my seated heart knock at my ribs against the use of nature?". Macbeth wouldn't have had these thoughts of committing murder in his head if it weren't for the Witches' prophecies, and later on, Lady Macbeth.
Lady Macbeth receives a letter from Macbeth, in which the news of the events that have occurred are written. Lady Macbeth says that Macbeth is too full of the milk of human kindness to be able to commit the murder, and so she proceeds to call upon the evil spirits to "...take my milk for gall" and...