Israel left Gaza. Why would they get up and walk away from a place they wanted to control buddy? Once they left, Hamas was elected into power (though now illegitimate since they were supposed to hold other elections).
So once again, Israel blockaded Gaza once the rocket fire began. Once Hamas took over, Egypt did as well. Now that Egypt is controlled by the MB, the border crossing is still restricted.
So explain the lack of consistency in your argument.. buddy.