@Dreamwolf How are you going to get them to move back into the ghetto? Assuming these are lower income neighborhoods we are talking about? It has happened in communities, and typically the poor get pushed out because the property values begin to go up and the poor can no longer afford the area. Or, it fails completely and the whites never populate the area as hoped.
There are a few communities where gay people have moved into black neighborhoods and renovated. Not sure why this phenomenum happens. It can be observed in the Wilton Manors area of Ft. Lauderdale, and the Cooper Young area of Memphis.
There are some planned communities that purposely put lower income and middle class living near each other to try and create a community of diversity, and give lower income a better shot at education and safe neighborhoods.