That's strange - I don't remember hearing Barbra Streisand being "deeply disappointed" that the United States tried to prevent this from being broadcast...
But, imagine if Al-Manar had caved in to the US request. I can just hear the words that Streisand would have spoken (or published on her blog) - "I am deeply disappointed that Al-Manar has caved in to right wing Republican pressure to cancel the network broadcast of the movie entitled "The Diaspora". (And I say MOVIE - because this is NOT a documentary - it's a television drama.)"
Oops, that was what she was saying about the flap over the CBS "The Reagans" biopic... Never mind...