No investigation, no right to speak. Nobody is saying discriminating against the breed is racist to the dogs - the vilifying of pit bulls specifically is part of a longstanding and pernicious campaign of racial stereotyping of the dogs in association with their owners. The image of these dogs is intrinsically linked in rotten American society and popular consciousness to black and latino people, and that is indeed part of a racist crusade.
edit: also, seriously? you're just going to come in to the thread, start out by saying "I'm not watching that" and then "whatever it's about, there's no racism get over it"? fuck off