That said, no one rejoices over the death of children. (Unless you want to count Palestinian rejoicing at every suicide bombing and 9-11.)
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."
That said, no one rejoices over the death of children.
Check posts #10, #11, #12, and #14 of this thread, just for a few examples to the contrary.