More importantly, what’s your superior moral alternative when a force breaches borders, murders hundreds, and takes and holds hundreds more as hostages, and then retreats to the cover of hospitals and schools in a dense city?
Let’s do a little thought experiment here. Say that everything happened exactly as before except this time they retreated and hid inside Israeli hospitals and schools, on the Israeli side of the border, full of Israeli citizens. Do you think Israel would attack those terrorists in the same way?