For those who remember the days and months that followed 9/11, there is an unnerving feeling of déjà vu about the Hamas attacks on Israel.

The same shocking images of carnage and grief dominating the news. The same disbelief that anyone could be so hateful, so monstrous, so evil as to do this to another human being. The same outpourings of support and unity from around the world. The same shared fear that this could easily have happened to us or our loved ones.

Now once again the drums of war are sounding on the world stage, not that they ever really stopped. Israel is preparing to invade Gaza, the Palestinians are nearing a humanitarian crisis, and the rest of the world is bracing for whatever blowback comes next.