What is mandated is the most appropriate education.
There are many frum children in the ERCSD public schools. However, when the ERCSD schools cannot provide the appropriate level of service, then the children are placed elsewhere, some in KJ, but not by any means most.
You are just quoting the anti Semitic “activists” who keep saying that, but it is not a significant amount of the total costs.
It is ironic that you are insisting that others do not understand when you are so clearly completely way off base.