Its not that they only had two fighter jets but sending two fighter jets to kill 2 people on an island is already over kill for normal humans so that's likely why. Additionally the story based on how its portrayed implies that they have many, many more attempts cuz this has been going on for over a month.
Now they ask help from China, then China throw some missiles and lo behold, some parts are made out of carton boxes and polystyrene foam, when explode it’s a fireworks 😂