Israel wants the end of "armed conflict" between Israel and Hamas, but it also wants to keep the "blockade" in place regardless. It can't have both i.e. a "blockade" is itself a belligerent act, and so int'l law says you can only instigate a blockade during an armed conflict.
World Jewish Congress: Nazi train treasures must go to rightful owners (Reuters)
from the article: LIVE BLOG: Day 6 of Israel-Gaza conflict 2012