How does characterization display hate and revenge in Romeo and Juliet?

Romeo and Juliet is a play about two young lovers, whose
love was 
destined for destruction from the beginning because of the
hatred 
between the two families, Montagues and Capulets. Therefore,
the 
themes of love and hate are very important in the play as the plot
is driven by these two themes. Shakespeare brings out the love between the two rivals
through Romeo and Juliet and their relationships with the Friar and the
Nurse.

“From ancient grudge break to new
mutiny, 

Where civil blood makes civil hands unclean.” (Prologue,
3-4) 

These two lines are about the feud between the families. It
shows that it is a feud, which has been brewing for many years. By repeating the words
civil, Shakespeare is stressing the fact that they are all civilians but the pride
within each family has led them to violence and evil. 
The play then goes
straight from the prologue into a brawl in the 
first scene between both
houses. It begins with servants from the two houses but later Tybalt, the son of the
Capulets, and Benvolio arrive.Tybalt, during the brawl, says to Benvolio about the idea
of peace, 
“As I hate hell, all Montagues, and thee.”
(1.1.65)

These are powerful words as Tybalt is ranking
Benvolio and all the Montagues at the same level as hell and is expressing extreme
hatred. However, by the ending of this opening scene, the audience is introduced to
Romeo, who almost represents the theme of love in the play. At this moment, Romeo is
too 
busy pining over his love for Rosaline to notice the brawl and
says, 

“Alas, that love, whose view is muffled
still, 

Should, without eyes, see pathways to his will.”
(1.1.165-166) 

Here, Romeo is thinking of love as Cupid, who though he
is always blindfolded, still manages to make people fall in love. This is
ironic 
because Romeo and Juliet would never have even considered each
other because of the feud between them. However, they still fall in love, as when they
first met they did not know that the other was their rival but Romeo is talking about
Rosaline when he says these lines, who is Juliet’s
cousin.

“Here’s much to do with hate, but more with
love. 

Why the, o brawling love, o loving hate, 

O
any thing of nothing first create!” (1.1.169) 

These lines almost sum
up the play as Romeo is talking about his 
experience of love in the way that
it can make him happy and sad at the same time. It is both love and hate. He is
connecting his feelings to the remains of the brawl he can see in front of him. From
this, he concludes that although their fight was partly because of the hate between the
two families, it is more about the love within each family that caused them to fight
against each other. Where he says, “O any thing of nothing first create” he is saying
that the love/hate relationship can take many forms and can be created out of
nothing,just as the brawl started because of the servants being arrogant and boisterous.
It is a sad happiness and a serious foolishness, which can be seen as an oxymoron as
though love is bound up in hate and Shakespeare uses them throughout the play to connect
the two themes.However, the reasons for the brawl are more to do with love
and therefore, love overcomes hate.