Probably its pointlessness. Macbeth accomplished nothing by killing Macduff's family. They were no threat to him, and killing them only made Macduff more angry and determined to have revenge. It also involves the killing of children. Then, as now, crimes against children are considered among the worst. The play is full of images of the murder of children: the finger of the birth-strangled babe, the baby whose brains would be dashed out by Lady Macbeth, Fleance, on whom a murder attempt is made, and Macduff's son who bravely puts up a fight against the "shag-eared villain". The Macbeths represent an attack on the future generation by the present, as unnatural child-killers. Macduff, on the other hand is a son who has killed his mother (mothers invariably died after a ceasarian birth at that time).
Macduff's family being murdered by Macbeth's orders causes many thanes to turn against Macbeth because it reveals his extreme cruelty and inhumanity. The act shows them that Macbeth is a ruthless tyrant who does not respect the traditional values of loyalty and honor that were important in their society. It also creates a sense of fear and insecurity among the thanes, leading them to question Macbeth's ability to rule justly.
Lady Macbeth does not convince Macbeth to kill Macduffs family. She convinces him to kill the King at the start of the play, but after that she has no input in the decisions he makes. Macbeth chooses to have Macduffs family killed so that he may seize the Macduff castle for his own. The witches also tell him to 'beware Macduff' when he visits them and so he feels threatened by him. Macbeth doesn't actually personally kill Macduffs family either, he hires the same thugs that he hires to assassinate Banquo and Fleance to murder him.
Macbeth sends murderers to kill Macduff's family in an attempt to eliminate any potential threats to his own power. This ruthless act solidifies Macbeth's descent into tyranny and cruelty, as he seeks to maintain his position on the throne at any cost. The murder of Macduff's family ultimately leads to Macduff seeking revenge against Macbeth, contributing to his downfall.
It's a two-part answer. One, Macbeth is a traitor and killed the King of Scotland. Macduff is loyal to the rightful heir, Malcolm. Macduff assists Malcolm in the retaking of Dunsinane castle and murders Macbeth. But Macbeth also hired assassins to have Macduffs family murdered. Macduff's wife and children were all murdered after he fled to England with Malcolm.
murder Macduff's family
What does Macbeth think as he anticipates the murder of
Macbeth and Lady Macbeth plan to murder King Duncan by inviting him to their castle as guests, then waiting until he is asleep to kill him. They plan to frame the chamberlains for the murder by planting the murder weapons on them.
Macbeth lost the Scottish throne when he was defeated in the battle of Dunsinane by the forces of Malcolm, the rightful heir to the throne. Macbeth was killed in the battle by Macduff, who was seeking revenge for the murder of his family by Macbeth. After Macbeth's death, Malcolm reclaimed the throne.
Lady Macbeth effects Macbeth's actions by pushing him towards the murder. Initially, Macbeth was unsure of what he wanted to do. He stated that if he was meant to become king, it would happen naturally. Lady Macbeth caused him to change his mind and planned the murder of King Duncan.
Lady Macbeth
Yes
why was macbeth releuctant to kill duncan
She desires the kingship for him and wants him to murder Duncan in order for Macbeth to obtain it. Not only that, but Macbeth has a weak will, and Lady Macbeth, being determined and intelligent, manages to persuade the indecisive Macbeth to commit regicide.