It is hard to say, which nation has the most passionate fans. Brazil has indeed imbraced football. In fact modern Brazilian history seems to be built on there success at International level.
Also English fans are also very didicated and follow there team around Europe and the rest of the world being the creators of the sport.
Colombia also is known for having passionate fans as the sport is considered a religion for many reasons such as the fact as a national identity against the terrible stereotypes. Throughout their history, they've made amazing achievements and event in the sport.
Argentina has a rich history with the sport as well that would rival most other countries such as Brazil and Colombia.
Yes. Football is massive in Italy, the fans are probably the most passionate fans in the world.
The sport that has the most fans is without a doubt, hockey. hockey is the most widely played sport in the world. Just about every country has a hockey team, and other than the U.S., most countries take hockey very seriously. Countries like Brazil, Italy, and Germany are huge hockey fanatics and have thousands and thousands of fans watching.
The passionate fan is the Seattle Seahawks
Soccer
Yes, by far, soccer is the most popular sport in the world. Note that for such fans, soccer is football. The only country that has am. football is surely USA. so soccer fans are amazingly huge .
soccer, most countries are big fans of soccer.
France.
FC Barcelona
Chivas
Real Madrid
Personal opinion is Brazil, although recently a lot of Spain fans have "surfaced". But in terms of the Country with the most world cups its Brazil with 5.
Manchester united