Romeo and Juliet
Who is to blame for the death of Romeo and Juliet?
Tybalt is to blame for the death of Romeo and Juliet: #1
Tybalt is at fault due to his fight with Romeo and Mercutio.
Tybalt caused the fight with Romeo and killed Mercutio causing Romeo to chase and slay him.
Tybalt is to blame for the death of Romeo and Juliet: #2
Because of the fight and death of Tybalt, Romeo had been banished.
At the end of the fight with Tybalt, Romeo had killed him and because of it Romeo had been banished to Mantua. Because of his banishment Juliet grieved.
Tybalt is to blame for the death of Romeo and Juliet: #3
Due to the banishment of Romeo, Juliet was crying. to try to make Juliet happier they arranged for her to marry Count Paris, causing her to get even worse. Because of the planned second marriage Juliet and Friar Lawrence came up with a plan for Juliet to fake her death before the marriage happened and when entombed the Friar would send for Romeo to take her from the tomb to Mantua to live out their lives. But instead Romeo received the news of Juliet's faked death too early not knowing it being false, rushed to Verona to see her, ending in both their suicides.
Tybalt is to blame for the death of Romeo and Juliet: Quote
Because Tybalt and Mercutio were killed the Prince decided to banish Romeo for being in the fight and killing Tybalt, "Romeo slew him, he slew Mercutio". this shows that Romeo had killed Tybalt.
Tybalt is to blame for the death of Romeo and Juliet: Conclusion
In conclusion, Tybalt is at fault for the death of Romeo and Juliet.
In the line of events because Romeo was banished due to killing Tybalt, Romeo and Juliet died in the sequence of events following.
Rick Astley - Never Gonna Give You Up