In the program notes from “Dai,” playwright Iris Bahr admits she’s not very fond of discussing politics, a messy business where, she perceives, “food is flung and historical facts are tossed about like ego-filled ‘I’m right!’ confetti.” Writing and performing a one woman show about the bombing of a café in Tel Aviv without pushing the politics may be an extraordinary feat in and of itself; Bahr’s tour-de-force production goes beyond this restraint to display in all its pain and humor the “splintered Israeli psyche” she clearly knows so well.