If you believe Bush fired Browne without reason, then you must put the blame on him.
Neatly hidden away at the end of the article there seems to be a reason why the help wasn't utilized - security concerns.
It still all goes back to Blanco. Instead of utilizing the National Guard to keep the peace, she let everyone run wild and FEMA couldn't send it's own people in, let alone another agency's people.
By the time the General got into NOLA and took back control of the streets the major rescue operation was over.
I think I will blame you instead!!! (Just Funning)
NSNR-THM