The Supreme Court in Fulton v. City of Philadelphia (2021) upheld the
religious rights of Catholic Social Services, saying the agency’s refusal
to certify same-sex couples as foster families could not be the city’s
reason for ending the agency’s contract.

Lemon v. Kurtzman (1971) said the First Amendment prohibited government
from providing funds to church-run schools. It established the Lemon Test
for establishment clause cases.

Mueller v. Allen (1983) found that a law allowing tax deductions benefiting
parochial schools was not in violation of the establishment clause of the
First Amendment.

The Supreme Court in 2019 granted a stay of execution to a Texas prisoner
who claimed prison rules denying him access to his Buddhist spiritual
advisor violated the establishment clause of the First Amendment. In Murphy
v. Collier, the court ruled this was “denominational discrimination.”

In Zelman v. Simmons-Harris (2002), the Supreme Court said a state program
allowing taxpayer money to fund school vouchers did not violate the First
Amendment.