not trying to dodge the questions - i have heard police describe one of the main reasons crime has morphed in NO is the pjs changing has caused gangs who had long settled turf battles to battle for new territory
it doesn't happen so much in the old St Bernard area b/c the neighborhood damage was extensive - but in 8th ward and central city areas that didn't get the damage, the housing squeeze is a significant contributor to the violence
BUT
at the end of the day - i think programs that strongly encourage diverse (in all its forms) neighborhoods is better in the long run than homogeneous neighborhoods