We all know soccer (or football, as they call it) is huge in Europe but which teams (clubs) are the biggest? Here are the 3 most popular European soccer clubs. Manchester United Possibly the only European soccer club that is a household name in the United States of America, Manchester United is the one of the most popular European soccer clubs, likely the most popular soccer team in the whole world. You can’t travel anywhere in the world without seeing a Manchester United car decal or a kid in a Rooney jersey. With an all-star team around the turn of the millennium which including player…