This was the subject of E Michael Jone’s book “The Slaughter of Cities: Urban Renewal as Ethnic Cleansing”
“Focusing on Boston, Philadelphia, Detroit, and Chicago, Jones shows that Government sponsored “renewal” of American cities was not a program that failed by going sadly awry, but instead was a planned destruction of the ethnic neighborhoods that made up the human, residential heart of the cities”
http://www.culturewars.com/Reviews/SlaughterReviews.html
I witnessed the murder of Trenton NJ by Urban Redevelopment.