Rockets rained down on cities and towns, bulldozers toppled border fences, and hundreds of armed militants from Gaza flooded the border and crossed into Israel. Some militants arrived by paragliders; others used boats to storm Israeli beaches.The ensuing death and carnage by armed members of Hamas claimed more Israeli lives than any attack since the Holocaust and caught Israel by surprise. But threats from the terrorist group are nothing new. A ¬rundown of Hamas’ history reveals an organization with a persistent commitment to wiping Israel off the map.Launched in 1987 as an offshoot of Egypt’s Muslim Brotherhood, Hamas has never...