Coming from white suburbia on the border of redneck boonies, all our dogs growing up used to range from confused and scared to pissed in regard to black people. Now though we live in civilized land, but it's still predominantly white. Our one dog now will get freaked out by black guys, but she just gets freaked out by guys anyway so I don't really think she's all that racist, just sexist.
Our other dog though... Omg he's so chill and doesn't really give a shit about much, but when black people come over, he's completely head over heels for them! He's completely in love with our one friend's wife, and every time she comes over, he's up her ass the whole time. A few times she brought over her nephew who was just a few months old, and I was so worried about how the dogs would act since they've never been around kids really, but I turned around, and Kobe was on the couch next to the baby, keeping a safe distance, and licking him all over his face. He was shaking all over with excitement, and would not stop with the fucking kisses, and the kid loved it. It was the craziest thing I've ever seen, because that dog know what "kisses" means and will only rarely do it on demand. He's anti-kisser, and doesn't get excited about much.