It was the only way to get to the Sheik who himself had targeted Jewish children.
The Israeli Prime Minister, Ariel Sharon, disagrees with you:
Mr Sharon said he and the Defence Minister, Binyamin Ben-Eliezer, would never have approved the air strike against a block of flats in Gaza City had they known innocent people were at risk."Israel did not know that there were civilians in Shehadeh's house," he reportedly told a closed-door meeting of his senior aides. "Had it known this, it would have found another way to hit him."
During WWII American bombs killed thousands of innocents. A sad but necessary cost of freedom and security.