I have a pitbull (American pitbull terrier) that is a rescue. He loves people, but is so aggressive towards other animals that I can hardly believe it.
After having one for years now, I believe there should be some sort of training or licensing requirement before someone can own one. The combination of innate aggression and power is truly dangerous
I can never walk my dog off-leash, I can never hand my dog to someone inexperienced. I love my dog, but responsible ownership is much more burdensome than any other dog I've had.