There are many reasons Americans don't like soccer, and the childish, embarrassing antics soccer players go into when they get touched is one small piece of the puzzle. Watch this video, and imagine what an American football crowd is going to think of this. It's priceless to watch them be in mid fake and suddenly get well when the ball is in play near them. Also, notice the delayed reactions they have once they can't get to the ball. It's as if they got hit with an invisible punch.
Soccer is a sport for countries that can't afford football uniforms. I mean that more literally than it may first appear. It isn't the world's most popular sport because its the best. It's the most popular because it's the cheapest.