Similarities of how cockfighting is views in America and abroad as dog fighting is.
Almost all the dog fighters in America and abroad also raise cocks. The two go hand in hand, but cock fighting is much more popular because they are cheaper to raise. That's the reason all the early APBT were small dogs. They require less feed to raise and the small dogs are preferred by some.
I find all the fear mongering about the APBT to be amusing. You're talking about a dog that doesn't get much over 60 pounds. It's common for a Rottweiler, Doberman, or German Shepard to weigh 90 pounds. The majority of APBT weigh less than 50 pounds. All this fear over a dog I can curl with one arm.
I'm not at all interested in cock fighting or dog fighting. I remember showing a Vietnamese friend who had been to many cock fights as a child a book about the APBT and he thought it was cruel to fight dogs but had no problem fighting chickens and actually like cock fighting.
All the countries that have cock fighting also have some dog fighting and use the American Pit Bull Terrier. The best Pit Bulls in America are fought down in Mexico where it's unrestricted.