An operation of such senstivity would only be approved at the highest echelon. Mossad did kill people in Europe and the middle east unhindered using European passport as well as Canadian ones. Those are professional killers that should be dealt with and refered to the highest international courts. An occupying country with ultimately pay the price. Time will tell.
Knesset passes 'Norwegian Law' allowing ministers to resign their seats, remain in cabinet (Haaretz)
from the article: Dubai: We'll go after Netanyahu if Mossad killed Hamas man