There was a touch of irony in the organizers’ request that attendees surrender all phones and laptops to prevent leaks at Wednesday’s New York Film Festival press screening of “NAZA.” The film, by Academy Award-winning filmmakers Yuval Avraham and Rachel Szor, provoked an extraordinary backlash before almost anyone had seen it: death threats, calls to strip the filmmakers of their Israeli citizenship and demands that the anonymous officers interviewed in the documentary be identified and prosecuted.