What exactly is the tragedy in Othello?

Othello is defensively proud of himself and his achievements, and especially proud of the honorable appearance he presents. The allegations of Desdemona's affair hurt his pride even more than they inflame his vanity and jealousy; he wants to appear powerful, accomplished, and moral at every possible instance, and when this is almost denied to him, his wounded pride becomes especially powerful. The tragedy is the young angelic Desdemona is killed over false rumor and slander. The proud devoted husband, Othello, is undone by his hubris and obsessive passion.