Really though the only difference in this particular strike is that Westerners died so the international uproar is a bit louder.
It's not just that Westerners died. It's the fact that these particular Westerners were part of the organization responsible for feeding a massive number of refugees, and that the organization would foreseeably shut down operations after a strike like this.
The West was able to support Israel only because they maintained the dubiously plausible pretense that they were making real efforts to minimize civilian casualties. This strike dashes that pretense to pieces.
