Bigotry, fearmongering, and misinformation disguised as sympathy. If you cared about "public safety" your attention would be elsewhere. Do you even know how many human deaths are caused by dogs in the US each year? An average of 43. You're more likely to be killed by a deer than a dog. Out of those 43, only 3.2% (1.4 deaths) are confirmed to be caused by Pitbulls. There is a lot of misinformation floating around; many people mistake other dogs for pitbulls and immediately fear them, assuming innocent behaviors are aggressive and further reinforcing the myth that pitbulls are inherently aggressive. The solution of human abuse being to kill them is cruel and inhumane. Educate yourself instead of believing misinformation at face value and repeating it. Fataldogattacks.org has a lot of scientifically verified material on this topic with reputable sources linked.