I've long been appalled by the willingness of government officials to discriminate against religious speech this way. It's true that under the Court's Establishment Clause caselaw the government generally may not itself engage in religious speech (especially in K-12 schools), nor may it give preferential treatment to religious speech. But this ban on government preferences for religious speech doesn't require or authorize discrimination against private religious speech. Such discrimination is itself unconstitutional; it violates the Free Speech Clause, and in my view the Establishment Clause and Free Exercise Clause as well (though that's less clear than the Free Speech Clause violation).

As the rain and the snow come down from heaven and do not return to it without watering the earth and making it bud and flourish so that it yields seed for the sower and bread for the eater, so is my word that goes out from my mouth. It will not return to me empty, but will accomplish what I desire and achieve the purpose for which I sent it.