The murder itself marks the end of a long struggle for power between the good (Malcolm, Macduff), and the evil (Macbeth). Many events hinted to the reason for Macduff murdering Macbeth. The murder of Macbeth was an inevitable act that was bound to happen. One of these events was prophecy of the three sister witches. Throughout the whole novel, everything that they had prophesized, had become reality.
When they stated that no man born of a woman would kill Macbeth, they knew that that excluded Macduff, because he was born by C- section. It was only fitting that Macduff kill Macbeth because he was the only one who was not born of a woman. Also, this had to happen because the witches had supernatural powers that made it possible. The Weird sister let Macbeth choose his path. In other words, it was fate that made this possible. Another reason for Macduff murdering Macbeth was that Macbeth had ordered the killing of Macduffs family.
This reason was, in my opinion, the most important one. Upon hearing that his family had been killed, Macduff become very emotional. Also, his anger towards Macbeth grew once he found out that it was Macbeth was the one who ordered the killing. The killing of his family caused Macduff to risk his life to get his revenge against Macbeth. Additional reasons for Macduff killing Macbeth was that he had to prove his allegiance towards Malcolm and that he had to prove that apparitions correct.
Macduff knew that Malcolm was the rightful heir to the throne and he was willing to help Malcolm get it back. Macduff is a good and moral man and he has to do the honest thing. As for the apparitions, they had always been correct and they had said that Macbeth should beware of Macduff. These apparitions foretold the future and Macbeth made the mistake of not fully understanding what they were saying.
All these reasons put together, give the answer to the question, “Why does Macduff kill Macbeth?” There is no true explanation as to why this happened, but each event explained gives a good reason as to why he did it. Together they form a good argument to justify Macduffs murdering of Macbeth.
