There are teams from every region of the world playing in the finals. The Europeans and Latin Americans are definitely the most fanatic, but unlike American football, soccer is at least somewhat popular in almost every country in the world. 204 national teams tried to get into this final. 32 teams from one country tried to get into the Super Bowl. There is simply no comparison.
The only thing about soccer that I don't like is that we aren't the best at it. It should be a matter of national pride to dominate the sport, but instead we leave it mostly to the Europeans and South Americans. Most of us have accepted defeat, often using various coping devices to explain it away (soccer is not important, it's for pansies, etc.).
Check NBA or Major League Baseball rosters lately, we sure don't dominate those sports anymore.