How is Capulet to blame for Romeo and Juliet's deaths in Romeo and Juliet?

Romeo and Juliet’s deaths could be interpreted to be Lord Capulet’s fault because he insisted that Juliet marry Paris.

Lord Capulet is a complicated man. On the one hand, he has a fiery temper. On the other hand, he can also be reasonable. When it comes to his daughter, Capulet is very passionate. His actions unfortunately lead to Juliet’s death, and Romeo’s too.

Lord Capulet takes part in the duel in the marketplace, but he...

Romeo and Juliet’s deaths could be interpreted to be Lord Capulet’s fault because he insisted that Juliet marry Paris.

Lord Capulet is a complicated man. On the one hand, he has a fiery temper. On the other hand, he can also be reasonable. When it comes to his daughter, Capulet is very passionate. His actions unfortunately lead to Juliet’s death, and Romeo’s too.

Lord Capulet takes part in the duel in the marketplace, but he behaves more reservedly during his daughter’s party. Juliet is his prized possession. At first, he seems very reasonable. He does not want his only daughter to marry too quickly. He advises Paris to win her heart.

And too soon marr'd are those so early made.
The earth hath swallow'd all my hopes but she,
She is the hopeful lady of my earth:
But woo her, gentle Paris, get her heart,
My will to her consent is but a part;
An she agree, within her scope of choice
Lies my consent and fair according voice. (Act 1, Scene 2)

He also seems to be mellow at Juliet’s ball. Tybalt is ready to fight Romeo then and there, but Capulet won’t let him. He says Romeo has a good reputation and argues that a fight will disturb their guests. Tybalt holds off until later, when he does try to engage Romeo. He kills Mercutio, who steps in to defend Romeo, and Romeo slays Tybalt.

It seems that Tybalt’s death changes things for Lord Capulet. He is so entrenched in grief that he reverses his position of patience on Juliet’s marriage. He insists that she marry Paris in only a few days. Juliet is horrified. After all, she is already secretly married to Romeo. Capulet just makes a lot of threats and seems to get angrier and angrier.

Hang thee, young baggage! disobedient wretch!
I tell thee what: get thee to church o' Thursday,
Or never after look me in the face:
Speak not, reply not, do not answer me;
My fingers itch. (Act 3, Scene 5)

He threatens to throw Juliet out if she doesn’t do what he says. She is grieving too, for her cousin and for Romeo. Her new husband was banished when he killed Tybalt. Juliet does not know what to do. She can’t marry Paris. Her only choice seems to be to go to Friar Laurence and ask for help. He gives her a potion to fake her death.

Capulet’s insistence that Juliet marry Paris immediately is what leads her to take the potion, which is what leads Romeo to think she is dead. Romeo kills himself, and when Juliet wakes up she kills herself because he is dead. Thus Capulet’s actions help lead directly to the deaths of the two young people.