So if someone from the Vatican was killed, it would be equivalent to 3000 9/11s?
If the average person has interactions with 1,000 people, 10% of the Israeli population knows someone who was killed. That's 10% of the nation has been punched in the gut and is ready for retribution. Practically everyone in Israel by has heard from someone who knows someone who has suffered a loss. The whole country is psychologically prepared for "an eye for an eye".
The Vatican? Maybe they'd just continue to turn the other cheek.