The Shakespeare Code
hide in the pocket of one of the ancient witches.
Macbeth is told by three witches that he will one day be king. This prophecy ultimately leads Macbeth to contemplate committing regicide in order to fulfill the witches' prediction.
how did the sailors' wife did to offend the witches
They said a lot of stuff - it depends which part you mean.
black are not witches becaues when you run over one you get bad luck.
the goblin of course
Not necessarily. There can be Witches who are not followers of Wicca. And one can follow and practice only the Wiccan rituals without using the Witchcraft. There are many Wiccans who Practice Witchcraft. It is like two intersecting sets in a Venn diagram. There are also Pagan Witches, Neo-Pagan Witches, Eclectic Witches, Satanic Witches and many more..
More correctly it would be witch's brew (one witch) or witches' brew (several witches). As for the brew part, the origin could be Shakespearean as in MacBeth where the 3 witches concoct a broth with unholy ingredients.
Because one of witches done something to one of the people so that's when they started hating witches
The doctor in Macbeth suggests that the person with unnatural troubles should seek help from the divine (B) for a cure, rather than from sources such as witches, Hecate, or Banquo's ghost. This reflects the belief in the play that supernatural problems should be addressed through holy or divine intervention.
Meryl Streep
There were a lot of people who really believed in witches. However the witches in Macbeth are not to be taken seriously: they have silly songs and dances and speak in silly rhyming couplets. But they were inserted (probably by Thomas Middleton who wrote one of the songs) because that portrayal of witches was extremely popular and the audience wanted more.