FEMA was in Mississippi and Alabama because the governors of those states asked for help before the storm arrived. As of this writing your governor still had not handed control of the rescue operation completely to the Feds because to do so would admit she made a mistake in not doing it to begin with.
The mayor may not have jurisdiction over the Orleans Levee District (OLD) Commission but he does make an appointment to it along with the six appointments that the governor makes.
As for integration the neighborhood where I grew up was integrated since the 1930's and still is. New Orleans did not need the Feds to tell it how to integrate.
Oh, yeah?! Then how come the majority of people left behind were black. And how come your mayor gave priority to guests at the Hyatt? And you still haven't given a legitimate reason why the buses were parked unless you really believe your "reason" was legitimate.
Oh, yeah...I forgot. It's because cops and bus drivers don't make enough money to give a sh!t about their fellow citizens.
Look, your logic confounds me. If you want to give your governor and mayor a pass, then go ahead. I don't live there. You do. And judging from the way your state and local authorities have dealt with this, before, during and after, and how you defend them, I'm glad it's you living there and not me.
I'm done...