My brother has an american bulldog. It lets kids ride him. He is as gentile as any dog I have ever known. Other bull dogs may be different and could be owner derived temperment. I think it is down to individual dogs and owners.
I hope that the adults step in and tell the kids that a dog is not a pony. Dogs are not beasts of burden or stepping stools.
A dog may tolerate something uncomfortable because showing pain in the wild is showing weakness.
No. The American bulldog has a very mellow temperament. Unless you aren’t supposed to be there. Actually very non dog aggressive, too. Awesome hunting dogs, probably the second best hog hunting dog in the world and the first (Dogo Argentino) is Am bull with some sighthound and mastiff (three doggo Argintino’s easily take down the largest boars, they have b sen bred to do exactly that)
Also the official dog of the Marine Corps (although the English bulldog is often depicted in artwork) and toften the choice of Teddy R.