I was in Buenos Aires when I learned about the brutal, unprovoked attack by Hamas on innocent Israelis along the border of the Gaza Strip. Retaliation would follow—of that, I was sure. In early 1994, I spent three months in Tel Aviv shortly after the first intifada (~1987–1993) in which Palestinians used random acts of violence to protest Israeli occupation of the West Bank and Gaza Strip. During my three-month stay, an American Israeli physician opened fire on Palestinian Muslims praying...