Pit Bulls may not even be the most aggressive breed of dog, but they are the ones who can and will do the most damage if they do snap. I had a mini dauchshund that we had to put down. Despite spending thousands of dollars on trainers, vets, a pet “psychologist,” psychotropic medications...she bit 5 people before we had to make that difficult decision. Fortunate for us, her bites were tiny and largely harmless. I think she only broke the skin once and just barely.
Chows, chihuahuas, collies, and cocker spaniels can ask be very aggressive breeds. Unfortunate for PB’s is that they are so big/strong and attack so relentlessly and violently...their worst attacks tend to make national news. I think Pitts are beautiful and I have found them generally to be very sweet and loyal dogs (although I have never owned one). I would never, however, let my children near one...especially one that I don’t know extremely well. Maybe less of a chance that they get attacked by a chihuahua, but at least the chihuahua wouldn’t leave them disfigured for life or dead.