Welcome to the Culture Wars, Part 36. Writes Frank Rich: “Public television is now so fearful of crossing its government patrons that it is flirting with self-immolation. Having disowned lesbians in the children’s show “Postcards From Buster” and stripped suspect language from “Prime Suspect” on “Masterpiece Theater,” PBS is editing its Feb. 23 broadcast of “Dirty War,” the HBO-BBC film about a terrorist attack, to remove a glimpse of female nudity in a scene depicting nuclear detoxification. Next thing you know they’ll be snipping lascivious flesh out of a documentary about Auschwitz.”