When thinking about this question you must take into account the racism that is in Maycomb at the time in which the book is set. Some characters in the story believe that black people are below white people and deserve the horrible treatment they get. They think that Atticus should not defend Tom simply because of the colour of his skin. There is no real reason why Atticus should not defend Tom Robinson.
scout hears a member of the idler's club saying that "the court appointed him to defend the negro". So, scout thinks that atticus had to, whether he wanted to or not, defend tom robinson. Chapter 16, Pg 180
Atticus Finch takes Tom Robinson's case because he believes in justice and equality for all individuals regardless of race. He is committed to upholding his moral values and doing what is right, regardless of the potential personal consequences. Atticus sees defending Tom as an opportunity to fight against the racism and injustice prevalent in society at that time.
She is afraid of him because she doesnt want him to do what he did to her father during the trial (write her name on paper). She also beleives that he insults her by calling her "Miss", since no one has ever called her that before. That gives you a good idea on how she is treated by others.
Bob Ewell, who is Mayella's father, beat her up
Jem refuses to go home, for several reasons. He wants to stand by his dad, and to protect him. He thinks doing so is right. He's growing up, and so rebelling against Atticus a bit more. And he's like Atticus, so it is in his character to stand firm when he thinks something is right.
he thinks its wrong
In Harper Lee's novel, To Kill a Mockingbird Jem tells Scout that he fears, their father, Atticus will get in trouble. Jem fears this because he thinks the group of men were apart of a mob that was upset about Atticus helping Tom Robinson.
Mr. Ewell spits in atticus's face and asks if atticus thinks he's to good to reply, this is when atticus says "no, to old."
Actually, Atticus doesnt mock Mayella. Mayella thinks Atticus is mocking her because he is caller her Ma'am and Miss Mayella, which she isnt used to.
He thinks that there is something wrong when Atticus leaves because Atticus takes his car. Usually there is a nice Chevrolet in mint condition in the garage because Atticus never takes his car. He loves to walk
Atticus thinks they didn't stay because scout has a blanket wrapped around her shoulders.
No, she is not. She thinks Atticus is being sarcastic and making fun of her.