Answer:
Macbeth's instincts are to do whatever it takes for him to claim the throne, which causes him to do terrible things like killing Duncan, Banquo and trying to kill Banquo's son. Some people stayed loyal because they'd known him for such a long time and after Duncan was murdered, Macbeth was next in line to be king anyway.
Explanation:
I attached a document that sorta relates to this. I recently had an assignment about Macbeth and discussed this topic.
