After the 2005 disengagement from the Gaza Strip by Israel, in 2006, Hamas won the Palestinian legislative election, triggering the 2006–07 economic sanctions against the Palestinian National Authority by Israel and the Quartet on the Middle East. In March 2007, Hamas and Fatah formed a Palestinian authority national unity government headed by Ismail Haniya. Shortly after, in June, Hamas took control of the Gaza Strip in the course of the Battle of Gaza, seizing government institutions and replacing Fatah and other government officials with its own. Following the takeover, Egypt and Israel largely sealed their border crossings with Gaza.
The blockade in Israel is and would be more strategically valuable to its citizens in the long run. Just look at the historic past of the nation and see how many conflicts arose between Israel and Gaza. People are still fighting with each other even to this day and the Israelites and people in Gaza could live with each other peacefully once this is instituted.
Israel's enemies in Gaza rely on an open flow of trade and commerce to keep the citizenry of the area satisfied enough to not become participants in the struggle in support of Israel. Limiting the flow of goods to Gaza will show the inhabitants of the area what kind of people are resisting Israel.