Cultural Blindness

I have been a lifeguard for four years, and have worked at the pool in my town's rec center. Usually it is a fairly easy job until you have to deal with people complaining, or if people do not get what they want. I was working one night with four other guards. There was a birthday party there with about ten girls, and they were probably ten to twelve years old. One of the lifeguards told one of the girls she could not get in the water unless she had a swimsuit on because she only had on a shirt and shorts which is one of our policy. A patron has to have on a swimsuit, and if they want to wear a shirt or shorts they have to have a swimsuit on underneath. Later the girls mother, who was also in charge of all the girls came up to me and complained. I told her those were the rules, and we had to be fair to everyone and I could not make an exception. The lady was pretty upset, but finally we found an extra swimsuit for the girl and she was able to swim. Later, while I was on break one of the girls in the birthday party was not following the rules, and another lifeguard blew her whistle and told the girl to come towards her. The lifeguard told the girl she had repeatedly not listened to the lifeguard about breaking the rules, so she told her she had to sit out for five minutes. The girl started crying, and then all of the other girls starting crying too. They were being extremely rude, and then the mother came running over. She started screaming at the lifeguard saying they were just little kids, and accused all of the guards of being racists against Brazilians. Her claim was just ridiculous because that was clearly not the problem.
The kids were not following the rules, so they were getting punished just like anyone else would. They lady felt we were picking on the kids since they were Brazilian, but that was not true because no matter anyones race we would have had the same policy with anyone. They lady assumed that just because we were an all white staff we must be racists. That was clearly not the case.