Any dog living with a hermetic sociopath will see kids as prey. However, pit bulls, pinschers and rottweilers were BRED to be aggressive. Look it up. Most breeds are a result of breeding for utility or aesthetic purposes. It's quite interesting. If you are defending domesticated animals, you should read into it. There's a wealth of information that will lead to realistic arguments to support your cause.
"What does it take to make people realize that pit bulls are not more aggressive than other dogs? My pit bull is the sweetest little love muffin, and he eats all the ice cream whenever I'm lonely."