I think you might under estimate the black men and women in chicago that illegally own handguns, and have for years, solely for protection. People here want to protect themselves. This will give them the chance to do it legally. I live right across the border in Indiana, and we've always had a concealed carry law. We've also been the murder capital. As I got older, I noticed that the hoodlums usually didnt get the permit anyway, but the people with familes, property, and shyt to protect did. I got my permit to carry at 21, and other than a couple of nikka moments (not on my end), I've never drawn on anyone.
We live in a gun culture. I think it's better to embrace and educate than to try to expell it. I hope it cuts down the violence, I think an armed citizen is a safe citizen. Illinois isn't letting these permits go easily either, there's a manditory 6 hr course for residents, and I have to take a 3 hr course as a permit holding non resident. There are other stipulations that I can't quite remember. But I honestly believe when this law is passes the crime against law abiding citizens will go down.
The black/white thing wont play too big of a role because the whole Chicagoland area is heavily segregated.