BUSH DENOUNCES ISRAELI AIRSTRIKE AS 'HEAVY HANDED'
Pres Bush condemns as 'heavy handed' Israeli bombing attack that killed Hamas leader Sheik Salah Shehada and 14 civilians in Gaza; administration says that Israelis knew apartment building hit with one-ton bomb was filled with ordinary Palestinians, including children; Shehada founded military wing of Hamas and was blamed for string of deadly suicide attacks, but scale of damage and televised scenes of infant's body being carried through streets prompt Bush to issue condemnation; photo; Israel says it had no choice and regrets civilian deaths, but military officials, reacting to international criticism, say they did not anticipate extent of collateral damage; top Israeli military envoys met in Washington with Sec Colin Powell and security adviser Condoleezza Rice hours before attack but gave no warning and may not have known (M)