And I think winning your military objective trumps press coverage at the time if the press might distract from the success of the mission.
While I completely agree with your take that international press could present a more objective take, there are a lot of famous incidents when the international press reporting in the country are still taken in by one side. It's no guarantee. [ETA: this is really old, but I'm linking to show that even when international press are allowed in, the reporting can still end up accepting one side's view and lending it credence:
http://en.wikipedia.org/wiki/Muhammad_al-Durrah ]
If the Gaza situation goes like it has in the last few weeks long enough, I'll come around to complete agreement with you, but in the short term, I think Israel's behavior is acceptable.