I played soccer at that age, my siblings did too, and my cousins do as well.
When you're 3/4/5 you're not playing soccer. There are no rules, positions, score, winner/loser or goalies. It's "go kick the ball around time". When the ball goes out of bounds the coaches, who are often just some dad, just give it to a player that has not had a ball in a while. No one is trying to win, there is no 'win', it's all make believe for the kids to have a chance to run around for a while in the sun. If one super-player wins every match, that sucks for every other player on the field including his team since they don't even get to "win", there are no winners. They just have to sit around bored with the other team because there is no point.
So the league refunded the parents fee and asked them to not come back (trespassed them). They are no longer legally allowed on the field and for that matter, have no claim to participate in the league seeing as they were refunded. They weren't kicked out on the basis of race, it was many parents complaining "Hey, I paid ~$600 for 'go kick the ball around time', and you are facilitating a situation where my kid doesn't get to kick the ball". This isn't a competitive format it's gym hour and they are not receiving the product they paid for.
A 3 yearold hogging the ball all game, isn't doing anything wrong. He's 3. He's should be instructed to share more but he isn't doing something that warrants the cops involvement. The parents however, that understand the situation and failed to correct it / their kids ability to share, do. The adults that received their money back, understand it. The adults that received a trespass notice, understand it. The adults, who the cops talked to not the kid, understand it. The parents of the superplayers here at being assholes and injecting their kid in a situation they already KNOW will cause problems. All the kids are just being kids and the other parents, as far as I can tell, just want their kid to receive the product they paid for.
Too many people in this thread letting their emotions control their opinion due to a scary headline about a subject they apparently know very little about.