DoesAnyoneKnow you are taking this far beyond anything that is being said in the schools.
All they seem to be suggesting is that, in this country, just because my family may not look like your family, we still treat people with kindness and ensure all are included, in this case, within the group that is the school and in the wider case (as children get older) within the structures of the country. It is nothing to do with religion.
It does appear that what some are saying is that there are people, for whatever reason they put forward, who should not be treated in an inclusive way. That could well be illegal and certainly not what our schools -all our schools -have been instructed to teach. I would not personally, want my children or grandchildren subjected to such bigotry.