LOL. I'm actually watching American Football every Sunday now. Mildly interesting, the 10 minutes or so of actual play during those 3 hours.
What do you insist on calling it football? You use your feet less in merkinball than they use their hands in european football.
People who are just fanatical fans like the sport they grew up with and are used to from childhood. People who really like sports see the interesting parts of lots of different sports. Over the last years I have learned to appreciate cricket (even played it!), rugby, and, yes, even american football. There is a good sport inside american football struggling to come out under all that padding, no-action breaks, stupid team names and advertising.
But, well, there is a reason hardly anybody but Americans play it. Football is, on the other hand, played universally (except the US, until recently).
"Doctor how can you diagnose someone with Obsessive Compulsive Disorder and then act like I had some choice about barging in here right now?" -- As Good As It Gets