when I lived in Chicago, it always impressed me that you had the surreal good life for the wealthy and the tourists down in the Loop and in the area around the Magnificent Mile. City schools were uniformly atrocious, and if you lived on the South Side or the West Side, you had a broken down city with lesser city services. I see that nothing has changed - only that the people who create mayhem and make life miserable for those who have to live on the South or West Sides are starting to create mayhem downtown and make life miserable for the wealthy and the tourists. Mayor Rahm had better put a stop to this or he will have a stop to tourism, conventions and businesses that have no particular requirement to be located downtown.
Until the Black culture changes and it stops producing Vicious Bastards there will be no chance of changing the anti-social, misogynistic culture which produces them. Certainly Chicago is not unique in having this problem or in not facing the real issue.
The mob attacks you reference are very few even if widely reported and are not limited to Chicago.