Dog Owner's responsibility

I am a firm believer that our right to own the choice of dog we wish, ends when we do not ensure it is properly trained, socialized and contained to ensure the safety of people and other pets. Pitbull people find many excuses for their dogs behavior. When a dog attacks, inflicting serious injury and or death on a person or animal, at that point it's irrelevent who is at fault..the dog or owner. Aggression towards humans or other animals is not to be tolerated. If you can't properly contain an aggressive dog, it should be PTS. Even Mastiff rescue will not take in an aggressive dog as they not only do not want to encouage the behavior but they don't want to then make the dog someone elses problem. There are too many well tempered dogs looking for homes.