Who murdered Caesar and why?
Are you referring to the play, Julius Caesar, by Shakespeare (which, by the way, is historical)?
Caesar was killed by eight conspirators and political opponents from the Roman Senate. The conspiracy was led by Gaius Cassius Longinus, known simply as Cassius in the play. Caesar's opponents feared he was becoming too powerful due to his many victories and popularity with the people. In the play, Caesar was said to have been offered the crown three times and refused. Nevertheless, his enemies feared that he would accept the crown and then Rome would be a dictatorship, not a republic. They also feared that becoming the king would corrupt Caesar.
Above all things, Rome should remain a republic. Caesar's friend, Brutus, let his love for Rome outweigh his friendship with Caesar and in spite of much soul searching, decided to join the conspirators. When Caesar entered the Roman Senate on the Ides of March (March 15), the conspirators surrounded him and killed him with daggers.
In the play, Caesar looks at his friend, Brutus, and says the famous "Et tu, Brute?" which means, "And you, too, Brutus?" History scholars disagree over whether Caesar actually said anything like this. In the play, however, Caesar then tells Brutus that Brutus' stabbing "is the unkindest cut of all."
Read the play at the link below. See the analysis on eNotes.
Ceasar was killed by Brutus along with other conspirators like Cassuis and Casca. Cassuis lure Brutus to the conspiracy. For, Brutus Loves and honors Rome over everything else ! By Cassuis`s persuasive tone , Brutus joined this conspiracy. At the beginning of Act II, We can see that Brutus Rejected three things which are : the oath , killing Antony , and joining Cinna to the conspiracy. From this we cas see that Brutus is now leading this conspiracy.
Brutus murdered Caesar along with other conspirators