The second thing you realize after looking at their video is they show lot's of teachers, fire fighters, police officers, engineers, nurses and chiropractors. Oddly, I saw no pole dancers, repo men or bartenders. They say teacher is the number one profession listed among the responses. So, they don't want you to stop thinking in stereotypes. They simply want you to think about the positive stereotypes associated with some professions and some skin colors instead of the negative associations people have about pit bull owners. Associations such as that idea that criminals and other deviants are more likely to be attracted to pit bulls and other dangerous dogs - which happens to be true and to have been described in a peer reviewed study.
Funny thing is just because the stereotype of teachers is that they are kind, intelligent, and helpful people, that doesn't mean they all are. When you google "teacher convicted" you get about 10 pages of results, and I bet you won't need two guesses to come up with the number one crime they're convicted of. Yeah, sex crimes.
And it is no surprise that googling "police officer convicted" gives up a mountain of results.
Being a teacher doesn't lead you to own a pit bull. Being a deviant leads you to own a pit bull.
And deviants go into all kinds of professional fields, including the "helping" professions, for all kinds of reasons.
Take Kim DiPrima, special education public school teacher, for example. DiPrima was convicted of second degree manslaughter in 2009 after her pit bulls, Popeye and Brutus, entered her neighbor's yard and mauled 90 year old veteran and retired crane operator, Henry Piotrowski, so badly that he eventually died.
She got 5 years probation and continued teaching until she was later charged with second-degree attempted murder, second- and third-degree criminal possession of a weapon and first-degree reckless endangerment for another fracas involving a felon ex boytoy and gunfire. Read a good write up about all the felons involved here.
Pit bulls maul, maim and kill more people than all other kinds of dogs combined. They are leaders in pet and livestock killing, too. So, if you, your family or your pet have been attacked by a pit bull, you are the majority.