From the start, Iago comes across as a person who hates and looks down on other people. He is angry at Othello for promoting Cassio over him, and he derides Cassio as incompetent. Iago compares Cassio to an unmarried woman ("a spinster"), thereby insinuating he is a "virgin" to real battle experience. In putting down Cassio, he also manages to cast contempt on women, as well as educated people who get their information from books. There seems to be nobody he doesn't want to spit on.
Iago shows his hatred of Othello as he alerts Brabantio to his daughter's elopement with him, saying,
Even now, now, very now, an old black ram
Is tupping your white ewe. Arise, arise!
Awake the snorting citizens with the bell . . .
Iago is not simply delivering bad news, he is trying to turn Brabantio against Othello by...
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