The place is a “private” school! The school has the right not to accept them.
This should be a “slam dunk, move along” situation with the numerous court cases which have upheld Christian school rights of association in this area. But the sodomites don’t care.
Take the kids to a Muslim based school.
It is a Christian school. They do this with Catholic schools on occasion; then, make a big deal about their not being accepted at the Catholic/Christian schools. It is an old publicity stunt.