They are not "bred to be aggresive and kill". I think its all in the owner of the dog, they are very good dogs in my opinion. My dog has yet to attacked anybody. Its all in how you raise them and how others treat him. Sharks eat living objects to survive, not a good comparison. Its not about having a "cool" dog, hell I have a chihuaha and they get along very good, I was actually very impressed on how they got along.

Good luck with finding the dog a good home man.