Yup, because Israeli lives are worth so much in the eyes of Hamas, that they practice restraint. You're right, the superiority of the IDF protects Israeli citizens and results in less deaths on the Israeli side, but the loss of lives on the Palestinian side is because the exact attitude is practiced in Gaza and formerly in the West Bank as well--their own citizens mean very little to them. You know this to be true, don't lie to yourself to further propagate your blind liberal views.
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: A letter to progressive U.S. Jews: These are your people