There are all of the probable reasons stated in the other answers here but don’t overthink Shakespeare. He has been studied academically for many years and by many intellectuals, as well as a plethora of pseudo-intellectuals, who congratulate each other on appearing to understand everything about him. Iago informs us that he loathes the Moor; yet he delivers one of the most ominous and odious lines in all theatrical characterization when he says: “I am not what I am.”
Iago is unquestionably a scoundrel from the core, as this play has been read and performed on numerous occasions. In his goals, he’s almost (if not outright) psychotic; he hates the Moor (he tells us), but it’s more likely that he hates himself and feels compelled to direct his hatred toward others (any and all persons) to relieve his self-loathing.
He claims that he has heard and has good reason to believe that Othello had a sexual relationship with his wife, which is highly improbable, yet I believe he understands it nevertheless. There was a lot of sexual envy on the part of white males in this situation.
He has not progressed far in the military due to concerns about his disposition. The military hierarchy is a picky lot, and they can tell the difference between a decent guy and a less-than-good one. Othello is no fool; he’s an excellent strategist and soldier who commands respect.
Iago is jealous of Othello’s success and decides to sabotage him. Iago’s envy reawakens when he sees Cassio being promoted. Cassio is younger, more attractive, and more popular than Iago.
Men have a tendency to blame others for their own shortcomings, Iago warns Othello to “be wary of envy,” but it’s Iago who is envious; not just one thing, but many things that match his own flaws and shortcomings.
He pretends to assist Roderigo but is really indulging his perverted desires. All that will be denied him will be paid for in cash. loss of dignity and blood of others.
Thoughts: Have you ever pondered what the handkerchief means to Othello? Have you ever questioned why Emilia takes it and gives it to Iago? Have you ever wondered why Emilia is so devoted to Desdemona and turns on Iago with such vehemence when she learns of his treachery’s extent? In most of Shakespeare’s writings, there is more of the human condition and less of the intellectual.
The struggle between Iago and Othello is a major theme in Othello. The resentment between Iago and Othello stems from two concerns: professional difficulties and personal issues. Would you want to know more? We’ll go through it in detail below!
According to the first account of Iago’s fury at Othello, his enmity is caused by a feeling of professional inadequacy. Iago is certain that he is competent in his field. As a result, he feels that he is the finest candidate for the job. Othello, on the other hand, chooses Michael Cassio, whom Iago believes to be less qualified, as a lieutenant.
Iago is concerned about this problem. He claims that Othello’s decision isn’t rational because he doesn’t follow the advice of military experts. Instead of listening to his military advisors, Othello chooses a guy who has never fought in the battle:
‘I have already chose my officer.’
And what was he?
Forsooth, a great arithmetician,
One Michael Cassio, a Florentine,
A fellow almost damn’d in a fair wife;
That never set a squadron in the field,
Nor the division of a battle knows
More than a spinster; unless the bookish theoric,
Wherein the toged consuls can propose
As masterly as he: mere prattle, without practise,
Is all his soldiership.
(Act 1, Scene 1)
The apparent injustice wounds Iago’s self-esteem. He feels he is a better and more qualified individual than Cassio, who has just been installed. This is a genuine cause of Iago’s animosity towards Othello. In addition, Iago uses Cassio as a pawn in his diabolical scheme.
It was constructed as a deterrent for both Othello and Cassio for their misdeeds. The second explanation of the Iago-Othello conflict is their marital strife. Emilia, his spouse, is charged with treason and sexual betrayal:
I hate the Moor:
And it is thought abroad, that ‘twixt my sheets
He has done my office: I know not if’t be true;
But I, for mere suspicion in that kind,
Will do as if for surety.
(Act 1, Scene 3)
Iago accuses Othello of sleeping with Emilia, despite the fact that there is no evidence to support it. As a result, determining whether the reasons are genuine or fabricated might be difficult. Perhaps they’re nothing more than fabrications created by Iago to justify his negative feelings toward Othello.
There is no evidence for the allegation. It appears that Iago wants to discover as many things as possible to despise Othello at this point in the play. He himself states in one scene that he is uncertain if Emilia strays on him.
Negative feelings pile up, justifying his final acts of vengeance. For Iago, it’s a mystery why Othello picked Cassio over him. As a result, he comes up with numerous ways to get back at Othello.
Human interactions are rife with examples of conflict between Othello and Iago, which is a typical example. Even now, humans employ facts to deceive others as a popular method.
Shakespeare’s Othello features human connections that are gritty. As a result, it is easy to become lost in the characters’ genuine feelings. This affects Iago adversely. He becomes overwhelmed with his feelings and emotions. As a consequence, he ends up causing significant damage and misery to innocent people.