Its embarrassing to know there in the USA
Its embarassing to know they exist.
I will say something about animal aggression/human aggression . . . I have a problem when a dog that chases, even kills, cats, bunnies,squariels, etc, is deemed vicious. Dog aggression, if its out of control, is a diffferent matter. A wildly dog aggressive dog charging me and Sarama out for a walk would be a nightmare. She'd try to protect me, I'd try to protect her, and everyone would likely be badly hurt. Now, most of the pitties I know are not psycho dog aggressive. And the one psycho dog aggressive dog I know well, his owners are going to immense lengths to reform him, AND he's totally, utterly nonagressive towards humans.
But when a dog attacks and kills or seriously hurts another dog, there should be a consideration of the circumstances, instead of just saying, well, he's just dog aggressive, no threat to people. (notably, though some breeds might be inclined that way, I don't know of any that are generally that out of control). Was it prey drive (killed the chihuahua), was it territorial? Was it provoked? Or is this dog incredibly aggressive towards other dogs, to the point of being a hazard to people who are minding their own business with their dog. So, the guy has a point, though not a very good one. Extereme dog aggression is scary, and should not be excused. However, I don't know many pitties that actually FIT that description.