In the old days Mossad snatched Eichman and Vanunu and brought them back to Israel for independent judicial trials. And the world applauded. The thought of standing trial and doing time in Israel would be extremely effective as an anti-terrorist measure. FUBAR extra-judicial killings are a dumb move, no matter how much you wan't to defend them. And currently, nobody is applauding you. Think about it!
Jerusalem Gay Pride Parade: Stabber is Yishai Shlissel, the 2005 parade attacker (Haaretz)