Now this is what I am talking about. Maybe you guys don't even realize that you're doing it but you are insulting the NFL with this here is a list of the largest stadiums in the WORLD by capacity:
http://en.wikipedia.org/wiki/List_of_stadiums_by_capacity
8 of the top 10 are in the US. Most of the rest are also American. The UK has the 20th largest stadium.
Now I have never made it "across the pond," to watch a soccer game but have seen many football games. Many with over 100,000 people in attendance (Ohio St vs. Michigan college football; over a 100 year rivalry) and it was loud as heck. I don't make statements about the "loud factor," of something I know nothing about. Why can't you just say "it's loud" or its "exciting," vs. saying that you can state with fact that it is louder than a football (American) when you cannot. By shear number of people who can attend, this is highly suspect.
Now if you mean by passion, that is *possible* as I consider myself a die-hard San Francisco Giants fan (baseball) and Sacramento Kings (unfortunately) fan (basketball) my passion tends to abate (temporarily) after the season, and especially when the baseball playoffs heat up in October and basketball in June (at least when the Kings were good!)
Stopped reading when you based atmosphere on capacity or loudness. Goodnight.
Even as a Rangers supporter, who is proud of the Old Firm atmosphere at our ground, Ibrox, the atmosphere with 60,000 people inside Celtic Park is utterly electric and there is NOTHING in the NFL to touch it.