You say you can't compare dogs to people, yet you say breeding violent dogs causes violent puppies, right? Why wouldn't you think the children of violent people would be born violent?
If we were to ban all the potentially dangerous things, Pits would be so far down the list you couldn't even find them.
Start with alcohol,guns,cars, etc.
You stated you cannot tame out a Pits violent nature, that will surprise the many Pit owners who have gentle, non violent Pits.
If you don't like them that's your choice. But you shouldn't deny the people who keep their pets under control w/o incident.
Prejudice is the lack of knowledge and experience of a subject.
Volunteer at a rescue or AC, you might change your mind.