This is absolutely stunning. I do recall early on they wouldn't allow relief workers in the city because of the armed gangs.
I am listening to my local talk radio station, now, and the point you addressed in your post, is being discussed on the Dom Giordano Show WPHT 1210AM, Philadelphia.
If the Red Cross had said, "The Louisiana authorities wouldn't let us in because they said it was unsafe," that would have been a different thing. That still would have been a major black mark against the Governor, whose job it is to enforce civic order and whose first priority should have been getting aid to the desperate people who needed it, even if it meant surrounding the Red Cross convoy with a battalion.
But as it turns out, that wasn't the reason. And not only was the Governor's first priority to get aid to those who needed it, but she actively thwarted attempts. She made it a priority to stop the Superdome and the Convention Center from getting any aid.