We’ re talking about faith. Last December, just before Christmas, actor Denzel Washington was baptized and licensed as a minister, and so it hasn’t taken long, chatting about his return to Broadway playing the title role in Othello, for conversation to turn to matters of belief. Not religious, per se; Shakespeare’s great tragedy turns on themes of love and jealousy and betrayal. Perhaps, I muse, Othello’s choice to trust the evidence of his eyes—a planted handkerchief—over his innocent wife Desdemona’s protests that she has never strayed is a kind of loss of faith, a misguided embrace of rationality over spirit. “Well, sure, he wants proof,” pipes up Jake Gyllenhaal, who costars in the production as Iago, planter of the aforementioned handkerchief, “and Iago keeps leading him back to the handkerchief—look,…