Amy Schumer was in the zone. This was in March, when she was filming on the street in Brooklyn for her upcoming movie “Kinda Pregnant,” a comedy about a woman who pretends to be knocked up for attention. In one take, Schumer emerged from a subway station while answering a phone call — and was interrupted by a stranger shouting at her from the sidewalk: “Fuck you, Amy Schumer! You’re a Zionist! You love genocide!” Disruptions of the four-letter variety aren’t unusual in a raucous place like New York, though they’re usually less pointed. Schumer didn’t break character, refusing to...