Ah, yes, the old saw, "my (spouse, best friend, etc) is black, so I can't be a racist". Been around forever, man. FYI, one's interaction with a few isolated people says little about their ability to make sweeping judgments about groups of people as a whole based solely upon the color of their skin.
Also, I live in North City and am lily white. All my neighbors are black. 90% of my street is black. 90% of my hood is black. Nobody I have met condones thuggery or has a 'don't snitch' policy. Not to say there aren't a minority of people that do - please don't paint all of us north siders with that tainted brush.
As Anonymous said above: "you don't know shit".