First thing I can think of that is endemic to Chicago is the large polish population I don't know enough about Poland's history to say for sure But that's where I'd start I imagine it's the same as other major cities Immigrant communities saw blacks migrating north as a threat for resources So they were targeted I'd also imagine there is a white supremacist presence on CPD
---------------------------------------------------------------If you can't understand it without an explanationyou can't understand it with an explanation