The "argument" seems to be that someone somewhere said "Israel occupies Gaza", therefore it does. Naturally this definition of "occupation" -- which trumps the fact that, say, no Israelies are there, Hamas (which openly declares it wants to destroy Israel) rules the place, etc. -- applies only to Israel.
Also, it comes from the same folks who usually consider governments or politicians to be the scum of the earth. Suddenly, when some government or politician says something against Israel, it's pure gold. This sudden high regard for politicians, too, applies only to Israel.
It's a bit like the attempt to declare Israel is a theocracy because it has no separation of Church and state -- while leaving, say, England outside the "theocratic" circle. Again a definition that applies, in the face of common sense (not to say the usual meaning of words), only to Israel.
It almost seems as if some folks here have something against Israel and are grossly unfair to it.