“Do you think we’re happy you’re slaughtering the Syrians?” Mr. Hadad said he answered. Hezbollah, the Lebanese Shiite militia, has intervened on the government’s side. The man replied that Hezbollah was fighting to protect a revered shrine near Damascus.“You killed half of Syria for the sake of a shrine,” Mr. Hadad said, and anger flickered across the man’s face.“If I were in an Arab country, I wouldn’t dare,” Mr. Hadad recalled. He said he then relented and told the man that dialogue between them would help.