One of the greatest qualities of sports is that it has the capacity to gather together people from all walks of life, from all around the world, from different cultures and different experiences, and unite them under a common interest. They say that math is the universal language, but if there are runners-up, it would be love, and then sports, and music as well.
This gathering of differences under one shared commonality applies not only to those on the outside of the sport, but also to those who participate. Especially in a more international game such as soccer, you frequently see players from countries all across the globe sharing one jersey on the pitch.