If DUmmies were human, what they would have realized is that with hurricanes people generally aren't going to evacuate until they know for sure the storm is going to effect them, which the people in NO weren't really convinced was going to happen until it was too late. Mandatory evacuation would have been laughed at as over-kill back then. With Katrina 3 years fresh in their minds, not so hard to get people mobilized in time to leave.
But, this type of thoughtful process requires the absence of hate, which the DUmmies can't do.
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