Iago's jealousy towards Othello quickly turns into a jealousy toward Cassio too because Othello appointed Cassio as lieutenant instead of Iago. Iago believes that he should be lieutenant because he has fought by Othello's side in battles and because he has actual war experience, whereas Cassio learned all of his tactics from books. So, he is jealous because he didn't get the job, but he is angry because he thinks that Othello made Cassio his lieutenant because Cassio helped Othello marry Desdemona. Iago doesn't know anything about proportion, meaning that if he has been wronged he will bring justice to himself by giving the culprit a punishment that doesn't match the crime. In this case, Iago wasn't appointed as lieutenant; therefore, he wants to torture Othello and Cassio mentally and then kill them. This could be the result of his hatred and
Iago's jealousy towards Othello quickly turns into a jealousy toward Cassio too because Othello appointed Cassio as lieutenant instead of Iago. Iago believes that he should be lieutenant because he has fought by Othello's side in battles and because he has actual war experience, whereas Cassio learned all of his tactics from books. So, he is jealous because he didn't get the job, but he is angry because he thinks that Othello made Cassio his lieutenant because Cassio helped Othello marry Desdemona. Iago doesn't know anything about proportion, meaning that if he has been wronged he will bring justice to himself by giving the culprit a punishment that doesn't match the crime. In this case, Iago wasn't appointed as lieutenant; therefore, he wants to torture Othello and Cassio mentally and then kill them. This could be the result of his hatred and