In Reynolds v. United States (1878), the Supreme Court found that while laws cannot interfere with religious belief and opinions, laws can be made to regulate some religious practices (e.g., human sacrifices, and the Hindu practice of suttee). The Court stated that to rule otherwise, "would be to make the professed doctrines of religious belief superior to the law of the land, and in effect permit every citizen to become a law unto himself. Government would exist only in name under such circumstances."
In Cantwell v. Connecticut (1940), the Court held that the Due Process Clause of the Fourteenth Amendment applied the Free Exercise Clause to the states. While the right to have religious beliefs is absolute, the freedom to act on such beliefs is not absolute.
Finally you cite some cases that are pertinent to the Indiana situation!