All of that land including in particular, the northern border
of “Gaza” belongs to the Jewish people of Israel and therefore
your points regarding this are well taken and understood.
Perhaps the statement of “Gaza” regarding the right to exist
could potentially be “taken out of context” or misconstrued
as to what it was intended to mean, I do not know so not sure
in this case how it was meant exactly. From the Nile to the Euphrates
to the Sea of Galilee, it is a divine decree that all of Israel will be
sovereign and free!