The problem both with Israel's invasion of Gaza and the attack on an Israeli plane in Dagestan is that both murderous attacks are against the wrong people.
Same with the Hamas attack on Israelis.
Hamas attacked random Israelis because of the illegal settlements gradually grabbing increasing amounts of Palestinian land.
The State of Israel then attacked and is attacking random Palestinians in revenge.
The Dagestan crowd sought to attack random passengers coming from Israel in revenge.
The old saying "If you plan revenge, dig two graves" is out of date. Now it should be "If you plan revenge open a whole cemetery for people who were never involved in the first place".