I believe that public schools should not indoctrinate or proselytize for any religion but I am also persuaded that excluding an objective look at the role of religions and spirituality while designing a school curriculum would make it impossible for students to understand much of the art, culture, literature, and history of humanity in all continents.
Even when reflecting on the momentous question of how education can produce good citizens, excluding any consideration of values based on spirituality can only lead to catastrophic results.

[Australian scholar David Thomas] Smith’s theory of religious persecution shows us that a general “system of tolerance of minorities” is perfectly compatible with the persecution of some groups, and the two things in fact go together in many modern democratic states, which answers the objection that Tai Ji Men cannot be persecuted because Taiwan in general protects religious liberty. It also shows that democratic states, unlike their totalitarian counterparts that are often irrational, cease the persecutions when they understand that the political cost of persecution has become higher than the cost of tolerating a group they do not like.