"Over a three-year period, despite overwhelming military, technological and economic superiority, we failed to achieve decisive successes in confrontations with both Hezbollah and Hamas." - Gidi Grinstein That is because neither operation was intended to actual crush the enemy. Both operations targeted infrastructure and civilians rather than enemy combatants. The Olmert government fought both wars for political advantage in Israel and not to actual destroy the enemy. Thus IDF casualties had to be kept low.
from the article: Comment / Israel delegitimizers threaten its existence