I think it fortunate there is one less stone thrower in the land. A man and his child were killed in a car accident because a stone was thrown. Others were killed and maimed. The author says the Arab spoke with his hands (when he threw stones). This is an extraordinary interpretation of the verb "to speak". It is in all probability extremely unlikely that the soldier intended to hit the thrower with the cannister. It was one of the inevitable accidents that happen now and then when riots occur. In any case, stones are lethal weapons and "who lives by the sword shall perish by the sword."
Islamist militants attack African Union base in southern Somalia (Reuters)
from the article: A courageous Palestinian has died, shrouded in stones