Gaza is held by a terrorist group, defined as such by US and other western countries. It also keeps attacking Israel with missiles. Nevertheless Israel exports medicine, food and concrete on a daily basis to help the civilians in Gaza. Do you think Israel should help them more in any way? What is a sufficient aid for an area which you're in war state with?
In addition, for importing/exporting commodities, Gaza could use the their western border with Egypt, which in contrary to the Israeli border, the Egyptian is closed most of the time for the same reason - Egypt doesn't accept the terrorist regime in Gaza. Maybe you think Egypt occupies Gaza as well?