After Othello wins Desdemona’s hand, Brabantio is overcome with jealousy and urges Othello that she may be a strumpet:
Look to her, Moor, if thou hast eyes to see.
She has deceived her father, and may thee. (Act 1, scene 3, 288)
Seeing that Brabantio was not fond of Othello to begin with, it is fitting that Brabantio would try to discourage Othello’s relationship with his daughter. Brabantio is racist and because of this he is jealous that othello is the suitor who has won desdemona’s affection. By trying to slander his own daughter’s reputation, he believes he can save Desdemona.
Brabantio, a senator of Venice, learns from Iago of Desdemona 's secret marriage to the Moorish general Othello and is outraged at the thought of his daughter on "the sooty bosom / Of such a thing as [Othello]" (1.2.70–71). He accuses Othello of having "enchanted her…with foul charms…with drugs or minerals" (1.2.63–74) and seeks his imprisonment as a sorcerer, but he is foiled when Desdemona testifies to her love for the general. (Boyce, 2005)
By accusing Othello of sorcery and using magic to persuade his daughter,