Stop re-inventing the laws of war. When hit react by hiing back 10 times as hard. The proportionality should be applied to minor incidents and not a ful scale conflicts. It simply does not work. Th goal should be to leave a footprint in the hearts and minds of the aggressor for a generation that the price is too high to mess wiht Israel. Nothing else will work.
from the article: IDF intelligence chief: Israel's next war will see heavy casualties