Even if only humanitarian supplies are being carried, Israel has every right, and even the responsibility, to maintain the blockade and isolate Hamas. I think an apt metaphor here is Sherman's march to the sea, which broke the back of the Confederacy, or the American submarine blockade of Japan which so drastically reduced the amount of shipping going into Japan that the Japanese war machine might well have been starved into submission in a few more months, even without the atomic bombings.

Until Hamas is ready to renounce violence and recognize Israel, such that the people of Israel can live without the threat of violence hanging over them, maintain the blockade. And don't forget that Israel does allow some humanitarian aid in by land. Frankly, few militaries in the history of warfare have ever been as humane as the IDF.