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Prime Minister Benjamin Netanyahu of Israel has made the right decision to significantly ease Israel’s punishing and counterproductive blockade of Gaza. The move was clearly intended to mollify Washington and Europe in the wake of Israel’s deadly raid this month on an aid flotilla trying to run the blockade.

If done right, and managed correctly, it should improve the lives of 1.5 million Palestinians trapped in the Gaza Strip without compromising Israel’s security. It should also focus more international attention, criticism and pressure on Hamas, which continues to rocket Israeli cities and refuses to accept Israel’s right to exist.

Israel has a responsibility to its citizens to stop the delivery of all weapons and rockets to Hamas. But the...