I think you're correct. As I understand it, 7 minutes of F9/11 is nothing but watching Bush sit in the classroom. 7 minutes in a movie is an eternity, Moore intended it to make the audience feel uncomfortable & edgy. A cheap shot (like all of them) on Moore's part, but Brokaw is apparently just acknowledging that it's effective.
You're missing my point. I understand that Brokaw MAY not have been critical. I'm talking about what he (Brokaw) says that HE would have said to those kids ... that "America is under attack"