Why do you think Israel started the blockade in the first place? Because it doesn't have what to do with its' soldiers and boats? Eventhough Israel left the Gaza Strip up to its' last person , the Hamas started to send terrorists over the border, to kill, kidnap, etc. Israel had no choice but to close tight the border between itself and Hamastan.The blockade started because of the Hamas war mongering and not the other way around.
Russia calls for international cooperation to fight ISIS (Reuters)
from the article: Hamas: Goldstone retreat doesn't negate war crimes committed in Gaza