oscar - true dat, brother. Of course, there is blame to be placed, even if you are pointing at the levees "and shit", as the federal government had provided funding for the levees "and shit" to be upgraded years and years before but...<wait for it...> corrupt Democrats running the state never seemed to get around to actually, you know, fixing up the levees "and shit".
Regardless - the levees "and shit" failed and flooded the city - and the disaster plan for such an occurrence -- like put everybody on those buses and drag their asses kicking and screaming if necessary out of town to safety -- was not implemented by the state and local officials, causing people to be trapped and endangered, thus endangering the lives of rescuers....all because of a failure of leadership.
so there is blame to be place all over.
and the reason you place blame is so that you can study the failure, and try to prevent it from happening again.
For example, if you have inept, corrupt leadership, you don't re-elect the corrupt leader once you realize they are to blame for endangering people's lives. sadly, the collective morons in NOLA didn't learn this particular lesson, and put the failure-of-a-mayor back in office, where he <gasp!!!> again failed the people, for which he is now under investigation...he wouldn't have been in a position to <potentially> commit these criminal acts and screw the people if he had been properly and openly blamed for his failures, and the people had learned their lesson that he is a suck-wad.
So the FAILURE to properly place blame on Nagin caused further harm down the road *to the same people*.