I think pitbulls and the breeds like them are insanely and inherently dangerous dogs and breeding them should be banned. Let the dogs that exist live their lives and then the breed can go away.
I'm also for euthanizing any dog that has proven it is dangerous. Like, if my dogs decided to attack people or other dogs and no means of fixing the behavior worked, I'd have them put down for the safety of others.
I had half my face ripped off by a dog when I was a kid, so I have zero tolerance for dangerous dogs.
Anything similarly dangerous and potentially deadly would require a license to own or operate. In some states it's illegal to carry a pocket knife but you can have 2 pitbulls at your side no probelm. It doesn't make sense.