The important question is whether the thrill of the kill was worth the consequences. Clearly Israel - as is shown by it's refusal to restore relations with the nation it offended by whacking a foreign national on it's turf. Israel, the modern Israel, unlike the past Israel of it's origins, has no use for peace and nothing but contempt for anyone who represents it.
President Rivlin meets with Pope Francis at the Vatican (Haaretz)
from the article: Israel denies offering nuclear weapons to Apartheid South Africa