Late Saturday, thousands of Gazans received Arabic-language cell-phone messages from the Israeli military, urging them to leave homes where militants might have stashed weapons. -- Associated Press, Dec. 27

WASHINGTON -- Some geopolitical conflicts are morally complicated. The Israel-Gaza war is not. It possesses a moral clarity not only rare but excruciating.

Israel is so scrupulous about civilian life that, risking the element of surprise, it contacts enemy noncombatants in advance to warn them of approaching danger. Hamas, which started this conflict with unrelenting rocket and mortar attacks on unarmed Israelis -- 6,464 launched from Gaza in the last three years -- deliberately places its weapons in and near the homes of its own people...

There is no question -- none -- that Israel's attack on Hamas in Gaza is justified. No nation can tolerate a portion of its people living in the conditions of the London Blitz -- listening for sirens, sleeping in bomb shelters and separated from death only by the randomness of a Qassam missile's flight. And no group aspiring to nationhood, such as Hamas, can be exempt from the rules of sovereignty, morality and civilization, which, at the very least, forbid routine murder attempts against your neighbors...

...Up until the Hamas takeover, 750 trucks would cross the border each day with imports and exports. As Israel's deputy defense minister at the time, I was in charge of this activity and promoted this trade with Gaza, since the border crossings were being controlled by Abbas's Presidential Guard, not by terrorists. The Hamas takeover is what in effect locked the gates of Gaza and forced its residents to suffer.

The rain of rockets on the citizens of Israel intensified. The cease-fire that lasted from June until Dec. 19 was used by Hamas to increase its military strength -- mainly to smuggle in Grad-type rockets from Iran, which have a range of 20 miles. In recent days, these missiles have struck cities such as Ashdod, Israel's main port, and Beersheva, the capital of Israel's south. No sovereign state would have resigned itself to having its cities -- cities such as Houston or Atlanta -- bombarded. No sovereign state would allow itself to be hit by even a single missile. That is the reason for the military campaign that Israel launched this week in a series of aerial strikes...

...Until the world recognizes that Hamas is committing three war crimes -- targeting Israeli civilians, using Palestinian civilians as human shields, and seeking the destruction of a member state of the United Nations -- and that Israel is acting in self-defense and out of military necessity, the conflict will continue.

I spent today reading accounts of Gaza -- NY Times, AP, Reuters, etc. There are no terrorists, just militants. Not much about past rocket attacks on Israel -- most everything on the crowded conditions of Gaza. Iranian aid is rarely elaborated on; stories about quiet Arab support for defanging Hamas are likewise rare; common is the buzz about protests in Europe. In reaction, I jotted down the following random thoughts...

Once upon a time, any military confrontation with Israel was a guaranteed way to unite the Arab world.

Not this time. As Operation Cast Lead wears on, it is becoming more glaringly apparent that a second campaign is concomitantly underway among regional neighbors -- and the enemy is not Israel...

Egypt's foreign minister said Thursday that Hamas must ensure rocket fire stops in any truce deal to halt Israel's assault on the Gaza Strip, criticizing the Palestinian militants for giving Israel an excuse to launch the bombardment...