Destruction is a form of creation. Why should God spare millions of people. If he did that everyday there would be no question or debate that there is a higher power. It was an act of nature. Mircales happen everyday, but to different people mircales could be very simple. God found my car keys, God found my remote control, God made me win a million dollars from the lottery. The point I am saying is, if there was never a tragedy in the world, we would never evolve. We would never become stronger. We would never see the errors in our ways.