https://www.npr.org/2016/05/10/477350069/friend-or-fiend-pit-bull-explores-the-history-of-americas-most-feared-dog

you are currently more lib than npr on this topic

e: relevant section added

GROSS: You suggest in your book that you think a lot of racism was projected onto pit bulls because they became popular in African-American urban communities not just as fight dogs and guard dogs but just as popular dogs to have at home and as dogs that could reliably help protect you if you needed protection. So in what ways do you think that, like, race entered into perceptions of pit bulls?

DICKEY: I think especially when kind of the stories about them started to spiral out of control in the late '70s and then into the Reagan '80s, they became kind of proxies for a lot of the racial tensions that were brewing in America. And I think as people felt these tensions - yet it was increasingly unpopular to voice them out loud about other groups of people, I think gradually those just got shunted onto the dogs. And so the dogs became proxies for human prejudice really because when the dogs were kind of working-class, average Joe, all-American dogs in the 1920s, that was one thing. But when the dogs became associated with the urban poor, then there was this move to ban them and to eradicate them and to portray them - as we know, I mean, you think about kind of Hillary Clinton's unfortunate superpredator comment, the dogs were also called superpredators.

No new owner may settle in the area so long as they possess such a dog. Critics argue that these bans are not based on sound scientific or statistical evidence—that pit bulls pose no greater risk than any other breed of dog. Advocates of these laws urge that the bans are crucial to protect the public health and safety from dangerous dogs. Yet, perhaps these concerns have less to do with dogs and more to do with the individuals who own them. Breed-specific legislation may be being used as a new form of redlining to keep minorities out of majority-white neighborhoods. “We don’t want those people here,” a city council member said of the bans. Strong cultural ties exist between pit bull dogs and the Black community. The same is true of the Latino community. Research undertaken here to investigate this claim suggests that people of color are perceived to be the most likely owner of this breed of dog. While at the present time, actual ownership data is not available, if true ownership resembles the perceived distribution measured here, such a finding may form the basis for a legal claim. Under new law, breed-specific legislation could be challenged under the Fair Housing Act if it can be shown that these laws are disproportionately excluding minority groups.

-The Black Man's Dog: The Social Context of Breed Specific Legislation, by Ann Linder

Also calling someone racist doesn't insinuate I think you're white, just racist.