HIstorically, blockades don't work right away, it takes years to change people's minds through their bellies! that's what a blockade is about. If there were a rational way to reach the minds of Gaza or the Palestinians, there would have been peace in 1948. The Arab blockade agasint Israel has been in force for what? 35 years and it still hasn't had the intended effect. It might yet, but this counter-blockade which turns all of Gaza's people into hostages ensures the survival of Israel a little longer, until there can be a general reconcilliation and peace. Until then, they must be blockaded or the Arabs can welcome them as immigrants, which they will not do; their choice.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: EU urges Israel to lift its blockade of Gaza