it's not only the europeans who adore it, it's the central and south americans, the australians, middle east and into asia. it's a remarkably simple game to play, all you need is basically a ball and something to cordon off a goal. the beauty lies in its simplicity.
americans dont typically have a taste for soccer, as homebred games like basketball, baseball, and football are dominant. but in the rest of the world, soccer was being played before those sports ever came to be, so it's only natural that it has the largest following.