As Prime Minister Benjamin Netanyahu of Israel addressed the United Nations General Assembly on Friday morning, protesters on the streets of New York City addressed Mr. Netanyahu and the world.

The demonstrators began gathering in Times Square, across town from the United Nations building, early in the morning. A Palestinian flag flapped in the breeze as some of the protesters, most of them young, held signs reading “End All U.S. Aid to Israel,” “Arrest Netanyahu” and “Stop Starving Gaza Now!”