The IDF could have used water cannons or tear gas or any other standard crowd control method. Instead they used live ammo. Why? The obvious answer is that now many civilians will think twice before joining a Gaza aid convoy, knowing they may pay for it with their lives. One can say that deterrence has been achieved, a goal always high on the IDF's list of priorities.
Kerry meets Egyptian officials in bid to assuage concerns over Iran deal (AP)
from the article: Israel Navy reserves officers: Allow external Gaza flotilla probe