Macduff was not born of a woman because his mother had a C section. The witches said no man born of woman could kill Macbeth.
The prophecy that none of woman born could harm Macbeth. Macbeth wasn't to know that by a technicality, Macduff wasn't "of woman born".
Of course. Macduff killed him. If that isn't harm I don't know what is.
No, Macbeth killed Macduff's family but not Macduff. Macduff kills Macbeth after telling Macbeth that he wasn't born of a woman; he was born of a C-section or "untimely ripped" from his mother's womb as it says in the play. After Macduff reveals this it appears that Macbeth gives up on fighting because he realizes that it is his destiny to die at the hands of Macduff and then he makes an effort to die an honorable fighting death. Macduff kills and beheads Macbeth off stage, and then he brings Macbeth's head on a pole and presents it to Malcolm the new and rightful king of Scotland.
Because he is the one who is fated to do so. The witches' prophecies are designed to designate him as the one who will kill Macbeth. "Beware Macduff!" "For none of woman born shall harm Macbeth." If Macduff hadn't been born by caesarian section, they would have found another way to point him out as Macbeth's Nemesis.
Lady Macduff and her son were killed by Macbeth's murderers. He killed them because he was really afraid of everything (after witches' predictions) and wanted to harm Macduff.
Macbeth didn't think Macduff was a threat because the witches said "None of woman born shall harm Macbeth." Macbeth welcomes this good news and, assuming Macduff was born the natural way, Macbeth thinks he has nothing to fear.
If you are referring to Shakespeare's classic Macbeth, it's because Macduff hates Macbeth. Remember, Macbeth turns evil because of hunger for power. Macbeth killed Macduff's wife and children because Macduff knew Macbeth killed Duncan. He wanted to kill Macduff, but Macduff was gone. Macbeth killed Macduff's family because he felt they were in his way and stopping him from achieving his goals.
In Shakespeare's play "Macbeth," Macbeth is killed in a duel by Macduff. Macduff reveals that he was not "of woman born" as his mother had a caesarean birth, fulfilling the witches' prophecy that Macbeth could only be killed by someone not born of a woman.
"Macduff was from his mother's womb untimely ripp'd". According to the definition accepted by the witches, this makes Macduff not "born of woman" and thus not subject to the prophecy that none of woman born could harm Macbeth. It's a bit startling to us, since most of us think of people delivered by Caesarean section as being "born".
Macduff reveals Macbeth by informing him that he was not "born of woman" in the traditional sense, as he was delivered via Caesarean section. This fulfills the witches' prophecy that no man of woman born would harm Macbeth, leading to his downfall and ultimate doom in their final battle.
He is the man not of woman born mentioned in the witches' prophecy, which is why they warned him to "beware Macduff". He is not born of woman because he was delivered by C-section. Apparently in order to be born you need to be born in the natural way.
Lady MacDuff and her children are killed in Act 4 of "Macbeth". Macbeth hires assassins to kill the MacDuff family because he fears MacDuff is plotting against him..