Americans enjoy a degree of religious freedom unknown in most of the rest of the world. The right of each and every American to practice his or her own religion, or no religion at all, is among the most fundamental of the freedoms guaranteed by the Bill of Rights. The free exercise clause of the First Amendment guarantees the right to practice one's religion free of government interference. The establishment clause requires the separation of church and state. Combined, they ensure religious liberty.
ACLU Urges Supreme Court to Protect Students’ Speech