While I have normally tried to have an even-handed approach to Palestine & Israel, this current phase of their seemingly endless conflict seems to tilt toward Hamas as the one to blame for destroying the truce.
Truces come and go in the Middle East. This one seemed for a time to be more effective than most. People were actually able to get on with their lives. Then, The US election heated up, and it looked like Obama would be elected. In my view, that was the pivotal circumstance that started Hamas on the road to killing the truce, and creating noise in Gaza in the hopes that the new president would be less strident than Bush on the continuing strife.
Well, I think that they have probably guessed wrong. While Barack Obama, the president-elect has no so far spoken out directly, his press people have, and what they are saying cannot be making Hamas happy. Hamas needs to stop the rocket attacks before even more people are killed senselessly. So far they have nearly 350 killed and over 1700 wounded against 5 for Israel. Those just don't seem like good odds to me.