You are correct, it is the handling. My son and his first wife used to have a Pit bull which they called Jersey because she looked like a Jersey cow. She was the gentlest you can imagine.
Pitbulls were bred to be fighters, there is no denying that. A Pitbull is a mix of an English Bulldog, (for strength), and a Rat Terrier, (for tenacity).
However, in the early 1900s, the Pitbull was also called the nanny dog, or the nurse dog, because of it's reputation for being so good with kids. Petey, the dog in the Little Rascals, was a Pitbull.
There are mean dogs, it happens. But I think most of the time it's handling. I'd own a Pitbull.