Chicago brought some of this on their own. A few years back they made a point to start demolishing some of the large public housing projects like Cabrini–Green, which in and of themselves were death traps wrought with unspeakable acts.
BUT... they were more or less self contained horror houses. People knew where they were and avoided them. Squads of gangs did "hit and runs" out into other parts of town, but for the most part, they stuck to certain areas of town.
But... when these places were demolished, those people had to go somewhere, so the people, and the violence they perpetuated went with them into other parts of town.
The same thing happened in places like Atlanta and to a much lesser degree my city.
Here, rather than deal with the problem, they built nice new condo-type housing projects or bought up foreclosed homes in suburbia and "section 8'ed" them, moved the "tenants" into them, and then literally paid non-criminals to live there. So far it's not working out too well for the non-criminals. And in some cases has turned decent neighborhoods into ghetto.
BUT... they were more or less self contained horror houses. People knew where they were and avoided them. Squads of gangs did "hit and runs" out into other parts of town, but for the most part, they stuck to certain areas of town.
But... when these places were demolished, those people had to go somewhere, so the people, and the violence they perpetuated went with them into other parts of town.
The same thing happened in places like Atlanta and to a much lesser degree my city.
Here, rather than deal with the problem, they built nice new condo-type housing projects or bought up foreclosed homes in suburbia and "section 8'ed" them, moved the "tenants" into them, and then literally paid non-criminals to live there. So far it's not working out too well for the non-criminals. And in some cases has turned decent neighborhoods into ghetto.