Israeli's leading paper, Ha’aretz, writes:
Sources in the defense establishment said Defense Minister Ehud Barak instructed the Israel Defense Forces to prepare for the operation over six months ago, even as Israel was beginning to negotiate a ceasefire agreement with Hamas. According to the sources, Barak maintained that although the lull would allow Hamas to prepare for a showdown with Israel, the Israeli army needed time to prepare, as well.
Therefore, it is certain that Israel's massacre in Gaza is not related to any specific recent rocket attacks by Hamas.
So why did Israel choose this moment to attack Gaza?
Well, the Bush administration will be out in mere weeks. And while Obama has made nice with AIPAC and Israeli interests, Israel isn't sure that he will be as acommodating as the current administration.
As Phyllis Bennis writes:
The Israeli decision to launch the attacks on Gaza was a political, not security, decision. Just a day or two before the airstrikes, it was Israel that rejected Hamas’s diplomatic initiative aimed at extending the six-month-long ceasefire that had frayed but largely stayed together since June, and that expired 26 December. Hamas officials, working through Egyptian mediators, had urged Israel to lift the siege of Gaza as the basis for continuing an extended ceasefire. Israel, including Foreign Minister Tsipi Livni, of the “centrist” (in the Israeli context) Kadima Party, rejected the proposal. Livni, who went to Egypt but refused to seriously consider the Hamas offer, is running in a tight race for prime minister; her top opponent is the further-right Benyamin Netanyahu of the officially hawkish Likud party, who has campaigned against Livni and the Kadima government for their alleged “soft” approach to the Palestinians. With elections looming in February, no candidate can afford to appear anything but super-militaristic.
Further, it is certain that the Israeli government was eager to move militarily while Bush was still in office. The Washington Post quoted a Bush administration official saying that Israel struck in Gaza “because they want it to be over before the next administration comes in. They can’t predict how the next administration will handle it. And this is not the way they want to start with the new administration.”