If it was even Israel that did it
It was cheaper to use 10 live man drones and a woman drone than a UAV.
Israel warned Hamas almost one year ago:
“We operate everywhere where we can hit terror infrastructure - in close places, in places further away, everywhere where we can hit terror infrastructure, we hit them and we hit them in a way that increases deterrence,” said Olmert, speaking at a conference in Herzliya”
April 1, 2009
http://www.haaretz.com/hasen/spages/1074654.html
There is no way it took 17 Mossad members to take out 1 Hamas. Perhaps the other way around but no way.