It is hard to understand where you became so confused. This discussion is not about Israel's borders. It is about the blockade Israel has imposed on Gaza: the borders of Gaza are the issue. Israel controls air, sea and all points of entry and egress of Gaza. The blockade is collective punishment of a civilian population: a violation of article 33 of the 4th Geneva Convention. Such a violation is a war crime.
U.S. to deliver 8 advanced F-16s to Egypt on July 30-31, U.S. embassy in Cairo says (Reuters)
from the article: Year after Gaza war, Hamas says ready to fight Israel again