Palestinians might have responded by using those greenhouses to grow flowers for export. They might have built factories, schools, hospitals, and hotels along their Mediterranean beaches. Had that been their choice, moderate Israelis surely would have made further concessions — for example, uprooting Israelis from the West Bank as well, and offering to negotiate a division of Jerusalem.

Instead, of course, Palestinians smashed the greenhouses and put Hamas in charge. Since then, Hamas has done nothing to spark economic development. Nevertheless, it has bemoaned the increasing destitution of unoccupied Gaza — now blaming it on Israel’s “siege” — and demanding aid, not least from Israel, which has given it (as has the U.S.), even as the rockets have fallen

We should understand by now that when Hamas officials vow to fight “occupation,” they are referring to any and all territory on which Israelis now exercise self-determination. Osama Hamdan, Hamas’s representative in Lebanon, said: “Our goal is to liberate all of Palestine, from the [Jordan] river to the [Mediterranean] sea…” Similarly Hamas official Mahmoud Zahar has said: ”We do not recognize the Israeli enemy, nor his right to be our neighbor, nor to stay, nor his ownership of any inch of land.”

This is not merely a negotiating posture, on which there can be compromise once diplomats arrange meetings. It is, rather, a religious conviction. Article 11 of the Hamas Charters states unambiguously that “the land of Palestine is an Islamic Waqf [endowment] consecrated for future Moslem generations until Judgment Day. It, or any part of it, should not be squandered: it, or any part of it, should not be given up.”

In Hamas’s view, a Muslim may do his duty and wage war for Israel’s destruction. Or a Muslim may shirk his duty. There is no third option.

One final thought experiment: Imagine that Hamas someday achieves its goal and wipes Israel off the map. Would that be the end of the global conflict now being waged by militant Islamists? Or would the Khomeinists of Iran — Hamas’s chief benefactor — al-Qaeda, the Taliban, Lashkar-e-Taiba and similar groups be energized and encouraged? Having vanquished the “Little Satan,” what is the chance they could be sweet-talked out of continuing to battle the “Great Satan” in pursuit of the power and glory they believe is their due?

By contrast, if Israel can deliver a crippling blow to Hamas, the mission of the militant jihadists will appear to have lost Divine sanction. As my colleague, the historian Michael Ledeen, has noted: “Nothing is more devastating to a messianic movement than defeat.” The National Review.