LikeWar: The Weaponization of Social Media: The following is an excerpt from the new book LikeWar: The Weaponization of Social Media and reprinted with the permission of Houghton Mifflin Harcourt.

• Author: Singer, P.W.
• Position: Book Excerpt - Excerpt

To many Palestinians who live in Gaza City, Ahmed al-Jabari was a hero: the commander of Hamas, the militant wing of resistance to the Israeli occupation. To Israelis, he was a villain: a terrorist who exploded bombs on packed school buses and rained mortar shells down on cities. But most of all, Jabari was a survivor. He'd lived through five assassination attempts and boasted that he no longer feared bullets or bombs.

His reckoning came on November 14, 2012, as Jabari and his bodyguard were driving down a residential street in Gaza City. High above them, an Israeli Heron drone loitered. Its high-powered camera zoomed in as Jabari's car sped past a packed minibus and onto a stretch of open road. Then the drone fired a missile.

Jabari never saw the explosion that ended his life, but millions of other people did. Even as his body smoldered, the IDF's official Twitter account spun into action. "The IDF has begun a widespread campaign on terror sites & operatives in the #Gaza Strip," declared @IDFSpokesperson. Then came an infographic that listed Jabari's crimes in bullet points, with a big red box reading "ELIMINATED" slapped across his glowering face. After that came the YouTube clip. "In case you missed it--VIDEO--IDF Pinpoint Strike on Ahmed Jabari, Head of #Hamas Military Wing." You could watch Jabari's car trundling down the street before it exploded in a ball of fire. You could watch him die as many times as you wanted (the video has since been viewed nearly 5 million times) and share it with all your friends.

Within a few hours, IDF aircraft had destroyed dozens of missile caches hidden across Gaza City. "We recommend that no Hamas operatives, whether low level or senior leaders, show their faces above ground in the days ahead," @IDFSpokesperson taunted. The challenge didn't go unanswered.

"Our blessed hands will reach your leaders and soldiers wherever they are," a Hamas spokesperson, @Alqassam-Brigade, fired back. "(You Opened Hell Gates On Yourselves.)"

The Israelis called it Operation Pillar of Defense. IDF air strikes perforated the buildings in which suspected Hamas fighters gathered, killing militants and innocent families alike. Hamas fighters responded with hundreds of unguided rockets, eager to kill any Israeli they could. Few reached their targets. Israel had a new, U.S.-provided trump card, the Iron Dome, a missile shield that could intercept the projectiles in midair. The result was an eight-day, one-sided campaign. The IDF...