Charlie Chaplin, Stan Laurel,Alfred Hitchcock,Cary Grant

I took it that was the point. They had to go to America to do the business on screen.

Are Americans really more thin-skinned than other people when it comes to any kind of joshing? Or is it just that they maybe come in for more than most other places? And there's more of them around, so the the occasional one who reacts all thin-skinned is more likely to come forth and be recognised.