Responding to Sunday's suicide bombing in Israel, President Clinton has frozen the U.S. assets of 12 terrorist groups and 18 individuals believed to be associated with terrorist organizations. White House officials also plan to launch a broader initiative against terrorists and drug smugglers, including tougher checks on suspected terrorists at U.S. entry points. Clinton's order targets a laundry list of the infamous. Among them: Islamic Jihad, thought responsible for Sunday's killing of 19 Israelis; Hizbollah, suspected in the 1983 suicide bombing of the U.S. Marine barracks in Beirut; Abu Nidal; Hamas; Black September; the Fatah Revolutionary Council; the Palestine Liberation Front; and the outlawed Jewish extremist group Kach. In Jerusalem, a Kach spokesman today warned: "We intend to fight Clinton in every possible way."