In the case of Frazee v. Illinois Department of Employment Security et al., 1988, William Frazee was denied unemployment benefits by the Illinois Department of Employment Security because he refused a job that required him to work on Sundays due to his Christian faith. The Supreme Court ruled in favor of Frazee, stating that denying him benefits violated his First Amendment rights to freely exercise his religion. The court held that even though Frazee's refusal to work on Sundays wasn't tied specifically to any recognized religious group or sect, it still constituted a sincere religious belief deserving protection under the Free Exercise Clause. This ruling reinforced an individual’s right for their personal religious beliefs and practices being protected under law regardless if they are associated with organized religions or not.

In the dissenting opinion for Frazee v. Illinois Department of Employment Security et al., Justice White argued that the Court's decision to grant unemployment benefits to an individual who refused work on Sundays due to religious beliefs was inconsistent with previous rulings and could potentially lead to a floodgate of similar claims. He pointed out that in prior cases, such as Sherbert v. Verner and Thomas v. Review Board, the claimants were part of established religious groups whose doctrines prohibited certain types of work or working on specific days; whereas in this case, Frazee did not belong to any particular faith group but claimed his personal interpretation of Christianity required him not to work on Sundays. Justice White expressed concern about how far courts would have go in accepting individuals' subjective interpretations of their religions when it comes down deciding whether they are entitled for exemptions from generally applicable laws.