Who let the Rabid Dogs loose on the Streets of Chicago

If I had to assign the blame for the actions of the 4 rabid dogs who tortured a mentally impaired young man in Chicago for simply being white and a possible Trump supporter; other than the four themselves, I would lay the blame squarely on the doorsteps of the current president of the United States.  His actions for the past 8 years have fostered, and to a lesser extent brought about a deeper division between the races than any other singular person in recent history.  But then who can really blame Obama.  After all, he is only a product of his environment---oops, that's Chicago!