Or because they simply weren't exposed to it, thus it isn't a custom in that country. They've recently incorporated American Football in India and it's caught on with great success, showing that not just Americans love the sport. You also factor in the fact that there was an actual demand in the UK for American Football, so much so the NFL responded to it, and holds I believe 4 games every NFL season in London, and the ticket sales for those events, alone prove that not just Americans like American Football, nor do they think it's garbage. Same goes Mexico.

But anyway, all mobsters are criminals, end of.