If the Missouri policy had prohibited Jewish or Muslim or atheist non-profit organizations from receiving grants for the Scrap Tire Program, I am certain that everyone here would understand such a policy as violating the Free Exercise Clause. The Free Exercise Clause protects against the government discriminating against all religions just as it protects against the government discriminating against one particular religion. This is among “the fundamentals of our free exercise jurisprudence” that the Court recounted in
Church of Lukumi Babalu Aye, Inc. v. Hialeah, and which the Court recounted again in the instant case:
A law, we said, may not discriminate against “some or all religious beliefs.” 508 U. S., at 532. Nor may a law regulate or outlaw conduct because it is religiously motivated. And, citing McDaniel and Smith, we restated the now-familiar refrain: The Free Exercise Clause protects against laws that “‘impose[] special disabilities on the basis of . . . religious status.’” 508 U. S., at 533 (quoting Smith, 494 U. S., at 877); see also Mitchell v. Helms, 530 U. S. 793, 828 (2000) (plurality opinion) (noting “our decisions that have prohibited governments from discriminating in the distribution of public benefits based upon religious status or sincerity” (citing Rosenberger v. Rector and Visitors of Univ. of Va., 515 U. S. 819 (1995); Lamb’s Chapel v. Center Moriches Union Free School Dist., 508 U. S. 384 (1993); Widmar v. Vincent, 454 U. S. 263 (1981))).
https://www.supremecourt.gov/opinions/16pdf/15-577_khlp.pdf
Frankly, nothing more really needs to be said in this case. It was a policy that violated the very purpose of the Scrap Tire Program, which was to increase access to playgrounds to all children by making the surface ADA-compliant; to make playgrounds safer for children, and to improve Missouri’s environment by reducing the number of discarded tires in landfills. And allowing religious non-profits to receive the Scrap Tire Program grants could hardly be construed as violating the Establishment Clause or any other provision of the Constitution.