Yeshvas in the US are private enterprises and if they feel that they will not be able to service a certain child, should they be forced to accept them? Or what about when the parents will attempt to undo what ever the schools are trying to teach? You think the school would be wise to accept this child.
As far as Friedman, the school has a simple eitzah, they can show that the results of academic testing show his children lag far behind and plcae them in grades 4 or 5 years younger.