People also KNEW katrina was coming and didn't have the intelligence to make their own decisions. If any of us knew a tornado was coming up the street, but the weatherman on tv says it'll miss, you still go to your basement. You don't stay in the livingroom and then blame the guy for killing your family...
New Orleans is a victim of rampant ignorance, New York is a victim of terrorism. Two completely seperate things and this is why New Orleans didn't get nearly the "how sad" reaction that 9/11 got, and deservedly so. Stupid people, leaders without a clue, in an area that's under sea-level and with levee problems documented years ago vs. People with no notice that a plane was about to be hijacked and steered into a floor of the skyscraper they worked in.
I'm sorry, but nothing i've seen in New Orleans had even a small percentage of the sadness as watching someone jumping out of the WTC so they didn't burn to death...