It requires quite a lot of things to go right. If your group is generally opposed, you need some authority that they'll respond to that will stop them from protesting, either keeping the message secret from the authorities you're trying to oppose, or without telling them the real reason in the first place. The assassinations have to be successful, without the assassins being caught, and present day assassinations frequently fail or are so difficult that they are not attempted in the first place. The authorities have to realize that pulling out would put an end to the deaths, but not decide to retaliate by further victimizing locals with an ultimatum that they'll continue until the assassinations stop.
he assassinations have to be successful, without the assassins being caught
Successful obviously. Failing to assassinate people is a terrible strategy. But the 'without being caught' is by no means required. In fact for that group that gave the role it's name getting away was not even a high priority. It was far more important to make the killing public and visible so as to best demoralize the enemy leaders.
...The authorities have to realize that pulling out would put an end to the deaths, but not decide to retaliate by further victimizing locals with an
A reminder for everyone: on this day in 1983, Stanislav Petrov saved the world.
It occurs to me this time around that there's an interesting relationship here - 9/26 is forgotten, while 9/11 is remembered. Do something charitable, and not patriotic, sometime today.