In 1910, inner city crime like we have today simply did not exist. Baltimore, Philadelphia, New York, London - all these cities had homicide rates that today you can only find in Pleasantville suburbia. It was the age of stern Victorian values and law and order policing. People did not have the luxury of giving criminals the benefit of the doubt, nor of allowing any kind of public disorder, lest their neighborhoods turn unsafe.
The trouble is, law and order tactics are a blunt instrument, and they are likely to offend and hurt good people too. Today, we are generally wealthy enough that moving away from crime is a possibility for the middle and upper class. Running has become easier than coming together as a community to solve the crime program. This especially true when "coming together as a community" means navigating big city politics, and cracking down on crime can get you labeled as racist. Today, when a community suffers from high crime rates, decent folk move out. First it was moving from the inner cities to the suburbs. Now, in many cases, people are moving from the suburbs back to expensive neighborhoods in the city. High real estate prices have become a substitute for crime control.
I think at some point we're going to have to stop the running and figure out how to stop the ongoing warfare in our cities. Allowing the crime is not doing anyone any good. Inner city men have astounding deaths from homicide. And the middle class is spending ever increasing portions of their income on housing. Everyone loses.