During the First Intifada against the Israeli occupation in 1988, he became a popular organizer and a leader whose efforts helped the formation of Hamas. Rantisi became Hamas's political leader and spokesman in the Gaza Strip following the Israeli killing of Hamas spiritual leader Sheikh Ahmed Yassin in March 2004. Rantisi opposed compromise with Israel and called for the creation of a Palestinian state (including the whole of the State of Israel) through military action against Israel.
In 1987, four Palestinian civilians of the Jabalya refugee camp were killed in a traffic accident that involved Israeli settlers and soldiers. Rantisi joined Sheikh Ahmad Yassin and Salah Shehadeh, among others, encouraging people to protest the occupation, after mosque services. This was the start of the First Intifada, which lasted five years. Rantisi became a popular organizer and leader whose efforts helped the formation of Hamas.
In December 1992, Rantissi was deported to southern Lebanon, as part of the expulsion of 416 Hamas and Palestinian Islamic Jihad operatives, and emerged as the general spokesman of the expellees.
On 8 June 2003, he directed a Hamas-led attack in which four Israeli soldiers were killed at the Erez Crossing in the Gaza Strip. On 10 June 2003, Rantisi survived an Israeli helicopter attack on a car in which he was traveling. He was lightly wounded in the attack, which killed one of his bodyguards, a civilian, and wounded at least 25 others. Rantisi also reportedly threatened, while in his bed in Al-Shifa Hospital, "not a single Jew in Palestine is safe" and "kill Israeli political leaders, because all of them are killers".
On 23 March 2004, Rantisi was named leader of Hamas in the Gaza Strip, following the killing of Ahmed Yassin by Israeli forces. On 27 March 2004, Rantisi addressed 5,000 supporters in Gaza. He declared the then-US President George W. Bush to be an "enemy of Muslims" and asserted that "America declared war against God. Sharon declared war against God and God declared war against America, Bush and Sharon. The war of God continues against them and I can see the victory coming up from the land of Palestine by the hand of Hamas."
On 17 April 2004, Rantisi was assassinated by the Israeli Air Force, when they fired Hellfire missiles from an AH-64 Apache helicopter at his car. Two others, a bodyguard (named Akram Nassar), and Rantisi's 27-year-old son Mohammed, were also killed in the attack, and four bystanders wounded. Israeli army radio stated that this was the first opportunity to target Rantisi, without significant collateral damage, since he took the leadership of Hamas, alleging that he had surrounded himself with human shields since the killing of Yassin.
Reactions
Israeli Foreign Ministry spokesman Jonathan Peled stated:
"Israel...today struck a mastermind of terrorism, with blood on his hands. As long as the Palestinian Authority does not lift a finger and fight terrorism, Israel will continue to have to do so itself."
British Foreign Minister Jack Straw condemned the action:
"The British government has made it repeatedly clear that so-called 'targeted assassinations' of this kind are unlawful, unjustified and counter-productive."
The Al-Rantisi Pediatric Hospital, in Gaza City, is named after him. It provided treatment for cancer and kidney failure.
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When a foreign journalist asked Dr. Rantisi, shortly before the failed assassination attempt in mid-2003, if he was afraid of death, he did not hesitate to answer, "It is death, whether by Apache or by a heart attack, and I prefer the Apache".