OK, here's my take on the subject and this based on both mine and my wive's experience having worked around dogs for years.
Pitbulls are dangerous for several reasons.
1. It's usually dickheads with a macho complex that keep pitbulls. They think they're badass so they have to have a badass dog and raise them thusly. Because of a pitbulls inherent proclivity towards aggression this is a recipe for a dog that is anti-social and aggressive.
2. Pitbulls are
highly territorial. This isn't a bad thing if they stay in their own, fenced yard but how many times does a dog get out? Once a pitbull starts roaming a neighborhood they expand the territory that they call their own including your yard.
3. Pitbulls that aren't spayed/neutered are even more territorial and during heat become highly aggressive. If it were up to me I would at least enforce a law that all pitts need to be spayed/neutered.
4. Pitbulls are inherently bred to attack and fight other dogs. Unless raised with another dog they don't play well with others. Anyone walking their dog through the neighborhood is at risk if there is a pitbull nearby.
5. This leads me to #5 which is somewhat in contradiction to #4 but pitbulls that are raised together have a very strong pack instinct. It is when pitbulls get together in a group and start roaming the neighborhood that they become highly dangerous to humans. Typically a single pit wioll go after other dogs but when in groups go after humans.
6. I despise the argument that if you ban pitbulls you need to ban Dobermans, Sheppards, Rottweillers, etc. How many attacks by these other breeds do you ever hear about? While the above three breeds have reputations as guard/attack dogs they simply don't have the levels of aggression and anti-social behaviour bred into them that pitbulls do. When a Doberman attacks you might go get stitches. When a pitbull attacks you'd better hope he is by himself and you'd better hope that there's someone around to distract the dog. Even a pitbulls physiology is that when attacking they simply inflict more damage.
This took place just 2 days ago. Read the story and see how much of it fits the profile I've laid out.
https://www.sltrib.com/sltrib/news/52844141-78/dogs-yarbrough-attacked-dog.html.csp
I'm with Ballou the Bear on this one.