Change the pitbull discrimination

In today's world pitbull are known as aggressive killers. It s the owner, and how that persons raises the dog. If you look in old biography pitbull where breeder to hunt boars,and the come home and be a loving pitbull a part of the family. They are very protective, my pitbull save me and my sons life, from a bear on a camping trip and almost died for us. I can't see how this breed is hated so much when its not the breed its the owners bad deed please help the pitbull breed to be known as a lover not a killer