I did not admit that they can be naturally bad so do not misunderstand me. What I was saying is that people either train them to do that or they inbred the living hell out of them. Inbred that hell out of any living thing and you would probably come up with another Jeffrey Dahmer. The Pit Bull that I had was nothing but a strong baby. He was great to be around, have with you. I trained him not to attack nor be afraid. He got along very well with my other dogs and they played rough. Only one MINOR fight which was started by my Alpha female and they broke up as soon as they got hit with a blast from the water hose. Some people couldn't tell a Pit from a Fox so they just assume that it is a Pit.
1st of all, inbreeding is NOT the pariah everyone makes it out to be. Every breed is "inbred"; it was done to get the animal to the state it is in today (which is extreme with dogs - no animal has so much divergent type as dogs). Inbreeding is not naturally damaging; it concentrates good as well as bad.
(Was Jeff Dahmer inbred? I didn't think so.)
However, strictly textbook inbred or not, some types gained amongst other obvious traits, not-so-desirable character traits. Thus, they ARE now naturally attuned to certain behaviors. Again, inbred in 4 generations or not. That is NATURAL. There is a reason "pit bulls" gained a reputation - even though many IDs of them are questionable. Same with Dobermans and German Shepherds, etc. It was bred into them, intentionally or not.
Every dog is an individual, as genetics is a real crapshoot, so even "dangerous" types could have perfect (or maybe imperfect!) specimens who exhibit NO "typical" behavior.
This is another reason I'm against bans. Each dog is different, although I'd agree the breed/type as a whole might be a certain way.