My daughter had a friend that had a baby and pit bull and the woman would rave about how wonderful and kind her pit bull was, and how gentle it was with her baby. Right up till the day the Pit Bull tore her baby apart.
We had a neighbor with Pit Bull, that had bit two people and another dog, one person was fairly serious injured and the dog was very seriously injured. But two of the bites occurred in one incident, so the authorities only counted it as 2 bit incidents, we had to wait until the dog bit a third person before the authorities would force her to get rid of the dog. The woman was in total denial, all she would say when people insist she do something, was we were all ignorant of the breed, she watches the dog be totally gentle with her children, he never bit anyone.
Aggression is a learned trait?
I had a mixed breed rescue Beagle, the dog would point perfectly at squirrels or any other potential prey.....
But no one every taught the dog how to do that?
Aggression very much is a natural trait, as well as many other things.
BUT, all traits and their prominence is nature vs nurture....
A Beagle can be an aggressive dog that bites people if it has been nurtured improperly.
I've met many wonderful Pit Bulls, but I'm sorry, I will not get one, nor have one around children. Like I said, first hand experience, a well nurtured Pit Bull that appeared wonderful, up and one day tore a baby apart.