Well it seems to me that the most fundamental freedoms that any nation can afford its citizens are the freedom of association and the freedom of dissent. Without those two, you just have a dictatorship of the majority. If that be the case, then it seems to me there is nothing wrong with a school that has compulsory attendence at Mass, or compulsory services or even compulsory observance of Ramadan, as long as both parents and adults understand and accept that position prior to signing on. That to me is far less dictatorial and dangerous than making children attend a school just because there doing so fulfils some artificial quota based on their race, or culture of origin, or gender.
“or even compulsory observance of Ramadan”
Nah. Freedom of religion was not intended to apply to heathen cults like mohammedism. It is of and from Satan. It should be proscribed, and its followers expelled from the US.