Like too many people you're missing out years of history, and the involvement of the US with Israel. It is crazy to suggest Hamas wants the Palestinians to be wiped out by the Israelis, which is what is happening. That fewer Israelis have been killed displays the stronger position of Israel. Notice how none of the other Arab states are involved... They are US allies.
What if the Israeli response is exactly what Hamas wants? In months, the rocket attacks only managed to kill 3 people in Israel, now, over 60 young Israeli men have been killed. Many innocent people have lost homes and businesses, making them prime targets for extremification, and a great swatch of the Western world is very displeased with Israel. Before, Hamas could do little, now they have done much.