Othello - Reflective Entry

The characters in this play anger me to some degree. I believe in many instances Iago is not believable and persuasive enough to realistically entice an individual to go along with his plan and/or believe his lies. Othello in particular bothers me. When Cassio was leaving Desdemona, Iago mentions that it is strange "that he would steal away so guilty-like, seeing [Othello] coming," (III.iii.40-41). Why would Othello go along with this statement when he was the one who pointed out that it was Cassio in the first place. He saw for himself Cassio walking away from Desdemona. If something was actually suspicious about his actions, Othello would have noticed it for himself. All the characters are so gullible in this play. None of them seem to really think for themselves. They listen to whatever Iago tells them. Iago knows he has this much control over others which ultimately drives him to be so power hungry. He feels accomplished when he has power over those above him, especially Othello.