Q: Why do people say, “Pit bulls are dog-aggressive not human-aggressive?”
Due to selective breeding for the purposes of dogfighting, pit bulls are highly dog-aggressive. This aggression is not limited to dogs; pit bulls frequently kill other companion pets and domesticated animals. Leading pit bull education websites warn pit bull owners to, “Never trust your pit bull not to fight.” These same websites also state that pit bulls should never be left alone with another dog or animal.20 The practical and moral question is: Why is “pit bull dog aggression” tolerated at all?
Pit bull dog aggression is unacceptable for two reasons. In many instances it leads to human aggression. A common scenario is the following: A loose pit bull attacks a leashed dog being walked by its owner. The owner gets seriously injured trying to stop the attack. Every year, one or more Americans suffers death due to pit bull dog aggression, including pit bull rescuers like Rita Woodard and Mary Jo Hunt who died while attempting to break up a fight between their pit bulls.
Secondly, far too many beloved companion pets and domesticated animals suffer a violent death by the powerful jaws of pit bull terriers each year. In some instances, these attacks involve pit bulls charging through screen doors of private homes — in a home invasion attack — to kill the pet living inside.21 Owners of the pet are then forced to watch as their dog or cat is disemboweled by the pit bull and pray that the animal does not turn its attention on an innocent family member next.
Learn more about human-aggressive pit bulls in Myth #3 of the Pit Bull Myths section.
https://www.dogsbite.org/dangerous-dogs-pit-bull-faq.php#bitestyle